If I was to pull the stock heads to clean them up would I be able to through a new set of undercut stem valves in them or do you have to get that valve seating compound to seat them? Also what are the factory head gaskets metal shim or composite? compressed thickness?

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89 350 TPI,comp cam,edelbrock intake base,SLP headers,highflo cats,flomaster cat back,accel 300+ ign,ported plenum and runners,ported maf,auto w/shiftkit,cold air induction,AFPR,Ed wright chip,3.23 posie best ET 14.011@98.72mph without cam/New best 13.926@98.27mph

 

you can use manely pro flow valves with no problems. i'd have the seats cut. the gasket is composite and about .039 thickness.

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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM