I did some J heads for a future 360. Proceeding with caution I removed only enough material to have smooth slaggy/parting line free surfaces. (No hogging out attempts at 351 Cleveland sized ports) I polished the combustion chambers, exh bowls and exh ports much more than needed simply because I could and was actually having fun. They look like sterling silver. The intake bowl was blended (machinists cutter enlarged valve to a 2.02) Intake side was gasket matched and the pushrod pinch? I didnt measure but just removed a little bit of wall thickness. Intake ports and bowls final finish was with a coarse sandpaper cartridge rolls. The guides I maintained caution. Steve Dulcich achieved incredible numbers porting J heads but man it he removed alot of the Int valve guide structure.Hes ported tons of mopar heads and flows them- I didnt try to duplicate his valve guide work. I left the guides srtuctural length but rounded and contoured every square edge. There are very swoopy and impressive (To me). As some just stated- this is hot rodding when we DIY.
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