I talked to friend about this and he said he still has his old 331 engine from back in the late 80's,I thought he had sold it. Its a tunnel ram,750's,stock GM heads ported to the nuts,big roller 6 something lift,13-1,alum. rods and some kind of steel crank. He pulled 8,500 all the time. Ya its old tech but it might be a base line. I think he said $2,500.00 when he was walking away but now he's gone for the weekend.