Engine Swap Questions 305 -> 350

6373 Views 4 Replies 3 Participants Last post by zikuslt1, Jan 21, 2004

Simple Me

Discussion Starter · Sep 25, 2003

Hi all, I am considering an engine swap in my 91 Brougham. It has the stock 305 in it now, but with bad rings, plenty of blow by, and kinda doggy performance to begin with, I am thinking I want something more. I was thinking of a GM Goodwrench crate 350, but I need to know if anyone has done this before. I will be going from TBI to carbureted, and I am not even sure if the bell housings will match up correctly. I am hoping that someone can tell me what I am getting into, I don't have to worry about labor if I decide to go through with it, so all the cost will be in parts, machining, etc....

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zikuslt1

· #2 · Jan 9, 2004

Simple Me said:
Hi all, I am considering an engine swap in my 91 Brougham. It has the stock 305 in it now, but with bad rings, plenty of blow by, and kinda doggy performance to begin with, I am thinking I want something more. I was thinking of a GM Goodwrench crate 350, but I need to know if anyone has done this before. I will be going from TBI to carbureted, and I am not even sure if the bell housings will match up correctly. I am hoping that someone can tell me what I am getting into, I don't have to worry about labor if I decide to go through with it, so all the cost will be in parts, machining, etc....

I did this changeover two years ago in my 91 5.0
I bought a GM 350 crate motor and have put 35,000 miles on the new engine. I don't know why you would want to go from a TBI to a carb.
The bellhousing will match up. Go with the GM crate motor, it has a 3yr. 50,000 mile warranty. Don't rebuild buy new it's cheaper than rebuilding.
I ran Valvoline 10w30 for the first 5,000 miles and then switched to Mobil 1 10w30 after that.

Good Luck.

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zikuslt1

· #3 · Jan 15, 2004

Are you still considering the engine changeover?

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92brougham

· #4 · Jan 20, 2004

zikuslt1...i am also considering it for my 92 5.0....i want more power out of my brougham but is it worth it to get the 350?...hows mpg with it?
how much worse?

justin

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zikuslt1

· #5 · Jan 21, 2004

92brougham said:
zikuslt1...i am also considering it for my 92 5.0....i want more power out of my brougham but is it worth it to get the 350?...hows mpg with it?
how much worse?

justin

I don't recall what MPG I got when I had the 305, but I get 21 MPG on the highway.

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