I just put in a street and strip cam in my 355 S.B. and I brought new R.P.M. air gap intake I have now S.R. world products heads been ported flow at 223 500 , 600 the new cam I put in is a 60141 lunati voodoo soild flat tapped 276-282 Avd 520-540 lift 241-249 dur on a 110 lobe I want to get really good heads... my S10 weights 3000 pds and running 373;s in a 12 bolt . I have 1100.000 coming back to me I do run this on the street but go to the drag strip a lot I'd like to hear some of ur opinions thanx Harv