You still have to determine how much mechanical advance is in the distributor. Many come with 28 degrees, add that to your initial and that's 38 total, too much. There are 2 small springs in the distributor that can change the mechanical advance. You should have 20 to 22 degrees in your distributor. If you do not know how to change it I would suggest taking the distributor to a shop to 'curve' your distributor.
Perry.
