I hope Carbking or someone can comment on the modification. Beside the engine running rough we also had difficulty getting the idle speed below 500 rpm, recommended idle speed with the hydra-matic is 400 rpm.
We did set the carb with a vacuum gauge. I also resolved the coil question...I wasn't holding the coil wire close enough to ground and initially the sun was shining on engine making it difficult to see the spark. I am also going to do a compression check to make sure the valves are closing. The cam grinder specified .012"lash on both intake and exhaust. Original spec was .020" on the exhaust.