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Thread: Big Block Chevy guys
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10-12-2004 #1Registered User
- Join Date
- Oct 2004
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- Papillion, NE
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- 203
Big Block Chevy guys
Hey guys, I have a 402 I want to put a set of LS7 rect port heads on. I havent got the parts in my hand yet, but the owner was asking if we thought there would be a clearance problems with the smaller bore.
Needless to say I told him to be sure I neded to check it out, but does anyone know if its a sure thing either way?
Mostly for curiosity. Thanks in advance
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10-14-2004 #2are you sure you want to put such a big pair of heads on a 396? I would opt for some oval ports, but the rectangles should bolt on just fine, take a head gasket and match it up.
10-14-2004 #3Registered User- Join Date
- Oct 2004
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- Papillion, NE
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- 203
Yes
Its a 4.88 geared drag car. We need it to breathe a bit better. I was concerned of valve size with the smaller bore. I'll check everything when I get the parts here, but I was wondering if anyone had any known interference problems.
In Ford circles, you cant run a 2.25 intake on any FE other than a 427 due to bore size. Wasnt sure if the LS-7 heads were any bigger and the customer doesnt know what he has.
Thanks and I'll let you know what I find.
10-29-2004 #4Registered User- Join Date
- Aug 2004
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- 345
i have a 396/402 block with AFR magnum 305 heads, they have 120 cc chambers and 2.25/1.88 valves i think and it clears, not sure what the sizes on the ls7 heads are though so this might not help.
10-29-2004 #5