[cancobra]

Well, thank you all again for your help with excellent advice as I always get in this forum. The problem ended up being flow capacity of the radiator. After installing a new high flow water pump, testing it and the car overheated. Then I installed a manifold mounted cap and thermostat... overheated again after the system was bled. I went back to the rad again since it was all it could be except a cracked block. It was hard to tell if there is blockage since it was moving liquid but just not at a rate high enough. I would have loved an aluminum one but opted to go with a rebuilt one with about 30% higher flow. I am very relieved to find out it was not a cracked block.