keep blowing head gaskets

gt40p

New Member
Aug 12, 2009
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Hi, new to this site,I have a 1992 notch with a 5.0, and just did a gt40p swap with the explorer intake. heads are p&p and shaved .040, arp head bolts, chased the bolt holes and the block and heads are flat, I have gon through a couple sets of head gaskets now. they keep blowing at the top of all the cylinder into the lifter vally. they will eventually breach the coolent ports. car dosent even run bad when they blow. the only thing i did wrong is i tourked the head bolts out of sequence, but still evenly and in three steps, (30 ,50 75) used moly lube and thread locker. question is will that make it blow them? thanks for your help