I have a set of heads & pistons 10.5 to 1 from a 1968 vette. Casting #3919840 GM3T D28. They just came back from machine shop, no cracks, not warped, all they need is new valve guids the heads look very good. The pistons are forged TRW 4.310 bore part # L2300F they also look new. I have a set of manly pro flo valves that go with the heads. $2500.00 OBO can email pics. stevetalbert@hotmail.com 314-221-9305