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Old Mar 5th, 19, 07:15 PM   #1 (permalink)
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Join Date: Mar 2019
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77 engine swap question

I picked up. up today and bought a 77 camaro with the body in solid shape with the original drivers.
It has a small block , I'm thinking a 305 and found a 454 out of a rollback I can get for around $400 or less.
the guy that owns it says it kept overheating. even after he put head gaskets on it.
I found a set of heads for it on eBay for a great price.
Would it be worth the time and effort to drop the 454 in or go with a freshly built small block? I'm not afraid of the commitment needed to complete it.'m planning on going thru the 454 anyway.
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Old Mar 5th, 19, 07:39 PM   #2 (permalink)
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Re: 77 engine swap question

There is no comparison between the torque of a SBC and that of a BBC. The BBC will peg your smile meter. Since the BBC was offered in a second gen through 1973 it will bolt up using factory parts.

The BBC may have a lot of scale in the block from the green yellow coolant wars. It probably needs to be bolied to clean it of grease and grime, and then baked over night at about 450 degrees to shed the scale.

Big Dave
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Old Mar 8th, 19, 10:54 AM   #3 (permalink)
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Re: 77 engine swap question

Quote:
Originally Posted by bg38 View Post
I picked up. up today and bought a 77 camaro with the body in solid shape with the original drivers.
It has a small block , I'm thinking a 305 and found a 454 out of a rollback I can get for around $400 or less.
the guy that owns it says it kept overheating. even after he put head gaskets on it.
I found a set of heads for it on eBay for a great price.
Would it be worth the time and effort to drop the 454 in or go with a freshly built small block? I'm not afraid of the commitment needed to complete it.'m planning on going thru the 454 anyway.
I wouldn't hesitate to do that swap. I'm looking to do the same on my 70. Headers, front coil springs and engine mounts and you should be on your way getting the big block in your car. You may have to put a bigger radiator in to handle the big block as well.
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1970 Camaro, 355 sbc, M20 4 speed, 4.56 8.5" rear diff
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Old Mar 8th, 19, 11:05 AM   #4 (permalink)
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Re: 77 engine swap question

Quote:
Originally Posted by Overtrained View Post
... and engine mounts ... You may have to put a bigger radiator in to handle the big block as well.

Standard SBC motor mounts (1973 clam shell style) are unbreakable while still fitting the BBC. There is no offset with a BBC in a 1070-'79 Camaro as the steering gear box is in front of the axle where it belongs. So there is room for BBC to fit between the fenders.

Any time you increase the power level you need to add cooling capacity.

Big Dave
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