Originally Posted by calrobb2000

hi

i have done several sets with hard seats installed for 1.74 valves for 383 s . use bronze guide liners also !

light port and blend and no problems . work good .045 milled off for compression .

intake side milled also .



Thanks for the info, any size or even better part nr for the hard seats? My machinist is a metric for mm instead of inches.
Milling the intake side is a good move.