RWD 19xx-1984 DeVille and Fleetwood, 1985-1996 Fleetwood and Brougham Forum Forum for discussions regarding the rear wheel drive Pre80s-1984 DeVille and Fleetwood, 1985-1996 Fleetwood/Brougham. | Cadillac Forums: 5.7liter frame to 4.1 body 
01-24-05, 11:47 PM
| | Cadillac Owners Member | | | | 5.7liter frame to 4.1 body im planning on dropping my 84 coupe on a 91 brougham frame (350)
and was told that the only (or biggest) problem i'd have was getting the newer computer to fit into the 84 firewall....
can anyone tell me where exactly the computer is located in the firewall??
anyone else with info on doing this????
thanks alot
eazy | 
01-25-05, 05:38 PM
| | Cadillac Owners Connoisseur Cadillac(s): '05 Dodge RAM Daytona, '67 Cutlass 'vert, 96 Dodge B1500 van | | Join Date: Oct 2003 Location: Florida Age: 38 | | | Re: 5.7liter frame to 4.1 body Ummmm, uh..............would it not be easier to just install the drivetrain from the 91 over to yours? | 
01-25-05, 05:47 PM
|  | Cadillac Owners Connoisseur | | Join Date: Jan 2004 Location: Amherst, NH Age: 22 | | | Re: 5.7liter frame to 4.1 body Your current frame is rotted I assume. If it measures up right and the mounts fit, I just think the computer should be your only problem. If your going to be doing all that work, then you could do some fab work to make that comp fit. Talk to coupedevillerop. I think he has something like yours, not on the 91 frame of course, but he may be able to help. | 
01-25-05, 08:10 PM
| | Cadillac Owners Member | | | | | Re: 5.7liter frame to 4.1 body Quote: |
Originally Posted by Destroyer Ummmm, uh..............would it not be easier to just install the drivetrain from the 91 over to yours? | yes, and no....... i'd have to weld on new motor mounts, which i really dont feel like doing
also, im reinforcing my frame, so this would be a good opportunity
besides that, i figured it would be worth it.. having a stronger engine, less rust on the frame........
(just pulling the engine and dropping it in is still an option...) | 
01-25-05, 10:18 PM
|  | 2009 Corvette ZR1 Cadillac(s): JimmyH | | Join Date: Jun 2004 Location: Kingsport Age: 24 | | | Re: 5.7liter frame to 4.1 body why are you switching frames? are ya juicin it  . had to ask. not many of us lowriders on the site. | 
01-25-05, 10:18 PM
| | Cadillac Owners Connoisseur Cadillac(s): '05 Dodge RAM Daytona, '67 Cutlass 'vert, 96 Dodge B1500 van | | Join Date: Oct 2003 Location: Florida Age: 38 | | | Re: 5.7liter frame to 4.1 body Quote: |
Originally Posted by biggeazy-e yes, and no....... i'd have to weld on new motor mounts, which i really dont feel like doing
also, im reinforcing my frame, so this would be a good opportunity
besides that, i figured it would be worth it.. having a stronger engine, less rust on the frame........
(just pulling the engine and dropping it in is still an option...) | I dont know exactly why you would have to weld in new mounts. Mounting holes for the SBC mounts might already be there. I swapped in a 350 Chevy in place of a Buick V6 in an 84 Cutlass I had awhile ago and the v8 mounts fit perfectly but in different holes (which were there) on the crossmember (I used V8 Monte carlo mounts). Check and see, the mounting holes may be there since the Fleetwood is basically a Caprice frame and of course the Caprice had a small block Chevy. I dont know your car, your frame may be way to rusty I'm just observing that if its not, this is way too much effort. Good luck either way. | 
01-25-05, 10:27 PM
|  | 2009 Corvette ZR1 Cadillac(s): JimmyH | | Join Date: Jun 2004 Location: Kingsport Age: 24 | | | Re: 5.7liter frame to 4.1 body Quote: |
Originally Posted by Destroyer I dont know exactly why you would have to weld in new mounts. Mounting holes for the SBC mounts might already be there. I swapped in a 350 Chevy in place of a Buick V6 in an 84 Cutlass I had awhile ago and the v8 mounts fit perfectly but in different holes (which were there) on the crossmember (I used V8 Monte carlo mounts). Check and see, the mounting holes may be there since the Fleetwood is basically a Caprice frame and of course the Caprice had a small block Chevy. I dont know your car, your frame may be way to rusty I'm just observing that if its not, this is way too much effort. Good luck either way. | you just cant stand to have the same stock engine in a car huh  ? so ya swap the engine in every car you get? must be a hobby or something.  | 
01-26-05, 12:14 AM
| | Cadillac Owners Member | | | | | Re: 5.7liter frame to 4.1 body Quote: |
Originally Posted by 93fleetwoodlowlow why are you switching frames? are ya juicin it  . had to ask. not many of us lowriders on the site. | yeah, im putting switches on it.....
i know it seems like alot just for an engine.. but ive was told that the mounts are different, and that id have to weld new ones in... and id rather just get the whole frame...
i guess im looking at it from the opposite side.... you guys say it's a lot more work to take the whole frame, and that it might not be worth the whole frame..
i see it like this- im taking the engine, making the computer fit, taking all the fuel/brake lines... the whole suspension... i'd rather take it all at once than have to take off and replace all the shit, one by one.....
also, im wrapping(reinforcing) the frame, so id rather do a newer frame with less rust, less buildup.... take a little time off the prep process... gives me more time to work everything else out..... | 
01-26-05, 01:15 AM
| | Cadillac Owners Connoisseur Cadillac(s): '05 Dodge RAM Daytona, '67 Cutlass 'vert, 96 Dodge B1500 van | | Join Date: Oct 2003 Location: Florida Age: 38 | | | Re: 5.7liter frame to 4.1 body Quote: |
Originally Posted by 93fleetwoodlowlow you just cant stand to have the same stock engine in a car huh  ? so ya swap the engine in every car you get? must be a hobby or something.  | lol yeah, I've got about 2 dozen motor swaps under my belt. Stock sucks  Besides, more time I spend in the garage means less time hearing my nagging wife and the kids scream  | 
01-26-05, 01:18 AM
| | Cadillac Owners Connoisseur Cadillac(s): '05 Dodge RAM Daytona, '67 Cutlass 'vert, 96 Dodge B1500 van | | Join Date: Oct 2003 Location: Florida Age: 38 | | | Re: 5.7liter frame to 4.1 body Quote: |
Originally Posted by biggeazy-e yeah, im putting switches on it.....
i know it seems like alot just for an engine.. but ive was told that the mounts are different, and that id have to weld new ones in... and id rather just get the whole frame...
i.. | yeah yeah yeah, just check to see if the holes for sbc mounts are there. Honestly Caddy's aint worth much. Trip to the local junkyard recently confirmed that. Tons of Fleetwoods, more 2 door models than 4 doors ironically. Dont spend more money and not a minute more time than you have to. I'm a real estate investor, everything (including time) is dollars and cents. :coolgleam | 
01-26-05, 04:55 AM
|  | Cadillac Owners Member | | Join Date: Jan 2004 Age: 37 | | | Re: 5.7liter frame to 4.1 body ALL YOU NEED TO DO IS USE THE 90'S FIREWALL...
THEN IT WILL ALL PLUG RIGHT IN...SINCE YOU'LL HAVE THE DASH OUT ANYWAY... | 
01-26-05, 05:16 PM
|  | 2009 Corvette ZR1 Cadillac(s): JimmyH | | Join Date: Jun 2004 Location: Kingsport Age: 24 | | | Re: 5.7liter frame to 4.1 body Quote: |
Originally Posted by Destroyer lol yeah, I've got about 2 dozen motor swaps under my belt. Stock sucks  Besides, more time I spend in the garage means less time hearing my nagging wife and the kids scream  | and if you want to do an engine swap, Destroyer can do it for ya.
what kind of set up you goin with? im gettin ready to start on mine. i was gonna go with a 3 pump 8 battery set up but i decided to go with 2 pumps 8 batteries. for a while anyway, ill get another pump in a few months to a year. | 
01-26-05, 07:50 PM
|  | Cadillac Owners Enthusiast | | Join Date: Jan 2004 Location: Bronx, New York Age: 25 | | | Re: 5.7liter frame to 4.1 body Quote: |
Originally Posted by RBraczyk Your current frame is rotted I assume. If it measures up right and the mounts fit, I just think the computer should be your only problem. If your going to be doing all that work, then you could do some fab work to make that comp fit. Talk to coupedevillerop. I think he has something like yours, not on the 91 frame of course, but he may be able to help. | I'm not the 83 Caddy know-it-all you think. All I know about the computer is that it's under the dashboard on the passenger side. I've never pulled the engine or took the body off the frame. | 
01-26-05, 11:21 PM
| | Cadillac Owners Member | | | | | Re: 5.7liter frame to 4.1 body Quote: |
Originally Posted by 93fleetwoodlowlow and if you want to do an engine swap, Destroyer can do it for ya.
what kind of set up you goin with? im gettin ready to start on mine. i was gonna go with a 3 pump 8 battery set up but i decided to go with 2 pumps 8 batteries. for a while anyway, ill get another pump in a few months to a year. | im going with a 3 pump, maybe 10 battery setup, but it's my first setup, so im gonna make a temporary rack, probably for 2 pumps, like 4 batteries.. then, at the end of the summer, ill throw some more shit in....
im just trying to get it off the ground right now, everybody keeps telling me how much it sucks when everybody has juice, and all you have is spokes, so im trying to at least have a little fun this summer..... ill have plenty of spare time for whenever im ready for another pump...  | 
01-27-05, 12:18 AM
|  | 2009 Corvette ZR1 Cadillac(s): JimmyH | | Join Date: Jun 2004 Location: Kingsport Age: 24 | | | Re: 5.7liter frame to 4.1 body go with 6 batteries its a whole lot better than 4. i had a 2 pump 4 battery set up when i first got my Cuttie and after i got rid off it it had 3 pumps and 8 batteries. when i had only 4 bats it was cool but after upgrading to 6 (when i still had 2 pumps) it was a whole lot better. who is doing the set up? a shop or you and some friends? where i live there are no shops and my friends and i are about the only ones that now how to do anything. some of my friends are a little more advanced than i am about stuff like that. one of my friends is starting a shop (trying to atleast) sometimes i just ask LOWCOS what he thinks (he knows more about juice than i do). he might be through eventually. well good luck and all. | | Cadillac Discussion Tools | | |
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