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Topic: 351w heads on 302

Jay302
Journeyman

Posts: 36
From: Louisville,ohio
Registered: Dec 2004

posted 12-12-2004 01:14 PM

hi im new here and am planning to put 351w heads on my 302. i have searched the topic on here and found out a lot exept 1 thing i want to have the heads milled to increase comp.ratio. the heads have a 60.4cc combustion chamber and i have flat top pistons with 2 valve reliefs. i want to acheive a 11:1 comp ratio or close to it, does any know about how much ill need to mill the heads to acheive this? all info appreciated Jay

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BLstangin
Gearhead

Posts: 817
From: St. James, MN
Registered: Apr 2002

posted 12-12-2004 07:25 PM

You won't, I have kb .200 dome pistons in mine that come out of the cylinders .003 because of a decking with one piston, then using these, milled my heads .020 and polished them and ended up with 62cc chambers and I'm only at 10.3:1. So the only way your going to get there is dome pistons, probably decking the block and milling the heads. Otherwise you'll be in the 9-9.5 range.

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1970 coupe restored with the help of my dad. 306 with 650 dp holley, Weiand Stealth intake, headers, mme custom roller cam, harland sharp roller rockers, kb pistons, 10.3:1 compression ratio, pertonix ignitor 2 with matched coil, lakewood bellhousing, 4-speed toploader, and 3.50 9" locker rear.
1986 f-150, 5.0, factory towing package with original c-6 trans

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