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head head and more head

  #1  
Old 05-21-2007, 03:35 PM
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Default 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???
 
  #2  
Old 05-22-2007, 08:13 PM
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Default RE: head head and more head

i guess this must be a hard question?
 
  #3  
Old 05-22-2007, 08:53 PM
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Default RE: head head and more head

Idon't know why... Just the way it is...
 
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Old 05-22-2007, 09:33 PM
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Default 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.
 
  #5  
Old 05-23-2007, 04:27 PM
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Default 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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