head head and more head
what is the difference between 86 and older heads, 87-95 heads, and vortec heads? i know that some haeds have a 23 degree plug angle or something but i heard that a intake for86 and older engines wont fit a centerbolt head or vortec and centerbolts are different than vortec why???
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RE: head head and more head
i guess this must be a hard question?
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RE: head head and more head
Idon't know why... Just the way it is...
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RE: head head and more head
the ones pre 87 had bolts on the outside instead of centerbolts. just a slightly different head for a slightly different block. as far as the vortecs theyre machined slightly smaller for higher combustion. same heads just built to maximize oem power i believe. my friend put vortec heads on his that didnt have vortec before and no problems.
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RE: head head and more head
i know about the valve cover bolts i thought the angle of the head where the intake sits might of been different or intake or exhaust ports being slightly different but thanks
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