when i changed the distributor before it ran great. but i installed a used distributor. thats why there was the question about the numbers on the side of the distributor. i have checked timing marks and everything shows to be on the money. just wish i could find out what it is without spending alot of $$$$. with the distributor that i just to off it would fire enough to start up if you messed with it enough and it would run but once you killed it and let it cool off it wont start back. then we started getting fire every so often.