thanks, im planning to use a mild performance cam in the engine so i dont think ill go over .5 lift or will i? another thing i have found is contradictery info. that the 5C-9 heads in one place,(http://www.highperformancepontiac.co...d_performance/
) they say that the 5C-9 heads are for a 350 w/A.I.R. and http://www.wallaceracing.com/head.htm
is saying that the 5C-9 heads are for a 400 block. Do you guys know for sure wich engine my heads are for?