Help with 351C Build
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Senior User
Joined: Jan 2013
Posts: 107
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From: Ventura Ca
Just curious, why would you want to bolt a pair of high compression closed chamber heads on a motor you want to be gas pump friendly ? With those heads and zero decked flat tops the compression is going to be right up there. Sounds like you need a plan, a comp ratio to shoot for. Believe me you are not going to notice the difference from 9:1 to 10+:1 on the street, other than the pinging you are going to hear using the cheep gas. You don't want to lock yourself into high dollar gas if you want to drive it much. For a street motor I'd be looking to be around 9:1. I'd just use the stock heads, cc them and try figuring the ratio with flat tops zero decked. People spend so much money raising the ratio, then so much time trying to get it to run on the crap gas. You don't want to end up with a pig of a motor you can't put any timing in and have to dump gallons of the crap gas through it trying in vain to just get it to move out of it's own way.
This is exactly why I started this thread. I have so many mixed reviews on the right way to build this motor, I have heard that the stock 2v heads cause ping even built stock and the AUS heads fix that with the flow. I am looking for the facts! LOL. I am sure that with some porting to the stock heads I could get rid of that. Thanks for the info as I am wanting to get the most out of this motor with the best results. Me being a Ford guy I want to show up those sbc engines in a FORD truck.
Posting Guru
Joined: Nov 2008
Posts: 1,937
Likes: 2
From: wyoming
mark is right on the money!
work what you have. porting and some headers will help with exhaust temps and pinging. nice modern cam and your definelty heading in the right direction. what rpms are you wanting to turn? looking at a cam with adv duration in the 265 to 270 is what i'm guessing. this little cleveland will come alive with a few upgrades. auto or manual? fuel today is crap and can go lean very easy if 10% ethonal is blended in fuel. good luck and keep us up to date.
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