It's a street engine. It's a .040 over 305, flat top 4 eye brow pistons, zero decked. The heads are, I'll admit, a little big. 034 Phase 3 Bowties. Already had them and thought I would give them a try. If they don't work out, I'll port one of the sets of 416 I have give them a shout. I'm having issues with the current cam/rocker situation and I already have a thread started on that. Truck runs good with a hydraulic 454 lift cam in it now, but it looks as though I'm going to have to pull the current cam to fix the issue and was thinking about a little larger cam. Namely a comp magnum solid 270 or 282 grind.