HELP!! need experts advice on 440 trouble.

Is there anyway to pull the valve spring and spin the valve to clear any potential problem on the seat? In other words compress the cylinder, remove the spring and spin the valve with pressure from the cylinder on it? Man I'm gettin' deperate! I hate it when things done right don't turn out right...I knew I should have tore the heads down and inspected them before putting them onto the new short block but I figured "hey, they worked ok on the old block so why mess with them....Murphy's law I guess. You guys are great for pitching me all these Ideas, I will try to keep a cool head and go through each one at a time.