Really need help major problem

[Mustang_289]

Thanx everyone for the great responses to this thread!

Don't want to rule out the head gasket, my son installed the heads while I was traveling and he used gasket sealer on the Felpro gaskets. Took the heads back off and cleaned the gaskets with solvent to remove all the gasket sealer.

We've got new lifters and pushrods stock, AFR heads are brand new.

I'm a little fuzzy on adjusting the rockers, I know this is a hydrolic setup. I remember from my old mustang days, you set #1 at TDC and you can adjust certain rockers/valves, keep rotating the crank in 90 degrees at a time till all rockers are done.

We've got oil reflectors, how do you adjust the rockers with the motor running?