help
 

lost compresion back 2 cylinders drivers side of motor having pulled an checked out any suggestion on what it could be or how expensive 383 stroker 425 hp all scat parts eagle crank went from 68mph to 60mph missing real bad when it gets warm no knoking in motor

pistons or valves, one or the other is burnt

ok thank u thats what i thought just wanted nother opion