windsor head swap
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Senior User
Joined: Nov 2003
Posts: 167
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From: vancouver bc
windsor head swap
im building a 351w right now, its out of an 85 f250. i got a great deal on a set of rebuilt heads off a 69 351w. is their much of a difference in combustion chamber size? what is the combustion chamber size on a 69 351w? what is the combustion chamber size on an 85? what will my compression ratio be with .030 over stock replacement pistons and the 69 heads?
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Senior User
Joined: Nov 2003
Posts: 167
Likes: 0
From: vancouver bc
it matters because i want to know the compression ratio before i put it together just in case its something way to high or way to low. also i want to know because i work in an industral machine shop and i can plane as much off as i want to acheve the desired compression ratio
Posting Guru
Joined: Jan 2003
Posts: 1,162
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From: House Springs, MO
Not really. If you plane off too much, your intake won't fit. What you'd want to do is figure out what heads you have, and then have them ported and polished, and then get the appropriate pop-up pistons to get you the compression ratio you're looking for. Get the casting numbers and do a search. There's lotsa sites out there that have the volumes documented.
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