I did the compression check one plug at a time on all 8 cylinders. All cylinders were in between 248 and 265. The motor did set for a while on a stand before I put it in the car.I havnt ran it yet I am waiting on HP Exhaust manifolds to be ceramicoted. fast68plymouth sounds like you are on to something. Once I run motor I will check again and post results. Thanks for everyones input.