Originally Posted by Horsepoweraddiction
Yeah I have flat top pistons and I'm sure they will work because the guy I bought it from was planning on putting them on a 454 , And would that compare with a set of the 781's heads? What could I do to get the compression higher?
If you could find a set of 781 oval port heads they are open chamber and 113cc. They could be milled but how much??? The compression would still be low at 8.5. I wonder if a set of [10141279 1996-up, Open 100cc Vortec7400] would work like Vortec's do on small blocks. Compression would be 9.4. Another Vortec Casting # 12560241 1998 -up, Closed 100cc Vortec 7400. Close chamber heads that would work are 3872702, 3904390 98.4 cc, compression 9.5. Checkout ebay http://www.ebay.com/itm/1973-1985-Bi...f#ht_500wt_969