Heads 290 cast 101cc chamber polished large oval port taken to rec port size Les 1/8 as witness line int 7 angle seat cut serdi blade all seat same size same depth all master cut
bowls blended and reshaped valves 45deg with30deg back cut to seat size all valves 11/32 stem int 2.250 ex 1.880 45 deg 30 deg back cut to burnish line. guides bronze replacement 1/2 no junk
guide liners no stone cut seats heads cc and cut on 570 broach all port lay out buy height Gage, valve steams all same length, all springs index and ends ground for true 90 deg set,
heads cc and match cut . Push rods to be indexed and proper roll out on stem. spring to match cam spec, intake rework to head port size heads work from 1500rpm to 6000 rpm small port high port velocity . will show more pictures later
