[goody]

can anybody tell me which one of these heads is the better heads 3998993 heads are 75cc and 14096217 285hp/300hp,64cc,72'or90' center intake manifold blot angles

 

[lluciano77]

What compression will 75ccs yield? 64cc?

The Vortec late model deads flow better in stock trim. Was that what you were asking?