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Hello, I have a '79 coupe deville that's trashed, but the 425ci runs sweet.
I want to put it in a '76 to '79 Seville. I don't have a Seville yet to do any measuring. Has anyone done this? Please let me know if and how it was done. What tranny did you use? This is my dream sleeper/drag car!!!! Thanks, caddykid4life
 

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that would be one heck of a sleeper car, if you do this try to find a diesel power'd one if you live in smog check land ,like california, plus it might be much cheeper to by the seville !!!,
as for if the 425 will fit , i know that the 1980-1982 sevilles had the 6.0 368 engine , so it might fit , but fit would be a tight one, good luck.
 

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It'll work... if the Seville trans is BOP you're set, otherwise just use the TH400 you have with the 425. The 425 mounts should work without problem (368/425 mounts sit right into SBC/common mid-70's+ GM mounts). It's amazing what you can literally bolt in with the right mounts :cool2:
 

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lux hauler said:
This is true and that makes the Olds 455 a bolt in..... :thumbsup:
But not as cool as a Caddy 472 or 500 ;) . I think the Cad motor would be easier to find as well since they are usually passed over while all the guys with 442's and other Olds musclecars have been snapping up 455's for years.

BTW: 472, thanks for the info above about motor mounts. I'm looking to put a 472/500 into a '77 Camaro and hopefully that will save me a load of cash not buying an overpriced swap kit.

Anyone have info about the oil pans for putting a Cad BB where a SBC used to be? I know I've heard that an Eldorado pan will work, but I've also heard people mention 425/368 "mid sump" pans? Did the RWD 425/368's have the mid sump pan? Will those work where a 350 with a rear sump pan used to be?
 
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