Thanks for the input, I agree. However, got BAD news this morning from the machine shop that both heads had cracks in them - so we're back to square one. My son just learned a hard lesson about buying an engine he knew nothing about. Total loss at this point - except the cost of experience. Now I have to decide if I try to get some Reman heads for the Magnum ($450 at a minimum) or tear the original 318 LA down and see what's involved in rebuilding it. Heads may be bad on it also. 1 step forward, 2 steps back...