mr2guru

iTrader: (16)

Just did a ton of reading up on these two....so,

Would the graphite ones be ok for H/C (~430whp) +100 shot? Strong enough?
Stock bore etc...

I think the graphite ones are more reliable at sealing but the MLS would hold more cyl pressure.

Either way I'll be using ARP head studs.

-Jim

ROGERSPERF.

I would use the MLS but you have to make sure the head and block serface are dead smooth.

mr2guru

iTrader: (16)

Yeah I would have no hesitation using the MLS if the block was recently machined. But it isn't. The heads are mirror finished but the block will not be after I removed the stock heads.

strokedls1

iTrader: (1)

The MLS gaskets are nice as they make future swaps much easier. Clean the block surface and check block and heads with a straight edge. Make your decision based off those results.