[ew95buick]

I have a set of 95 Z28 aluminum heads, would like to put on a 95 buick wagon. Will they increase the compression ratio, or is there any reason this change would be a problem?
thanks, Tom

 

[Rocko350]

So many of us say "use search" that in and of itself should be searched upon. You can put them on. It will raise compression if used with the OE B body head gasket. These heads do not flow as well as the iron heads you are removing. You will be saving weight, but losing thermal effciency. But in a nutshell, unless they have been ported, other than weight savings, they are almost counterproductive.

Chris
Please read the stickies

 

[ew95buick]

Thanks, this info is a big help. Tom

 

[HVYSS]

If stock its not worth the trouble to swap. Actually the iron Bbody heads flow better than the fbody alum heads do stock for stock.

 

[40767]

It's also a lot easier to install decent valves in the LT1 iron heads compared to the aluminums: