Pressure test the block. This will tell you if you have a big job on your hands. Don't forget you need to retorque the intake bolts...after you run it.

Did you check the head and block with a straight edge to make sure there was no warping?

before you tear down. Run motors until hot. Idle around for a few minutes then shut down. Pull the exhaust manifolds away (not off) and see if there is any moisture in the runners. This is the only way to check for reversion.

*lofty, thanks for the clarification. was wondering how i'd check that.
*screamin, damn, i did not do that - proably have to next.
*bluebyyou, i did not retorque intake bolts - will do; and what's the best way to pressure test the block?
Thanks to all - jeff