I found some others on this site that were having the same problems. Their solution also fixed my problem, a lot of initial timing. It is a fresh rebuild 360, and its been a long time since I built a stock cam motor (340 cam specs). The problem I was having seemed like a valve train problem, or vacuum leak, it idled rough, had a bad flat spot off idle, and died in gear. I had 10 degees of timing and that was not enough, it needed 18 BTC initial degrees to run correctly. I've never advanced a stock motor that much to get it run, maybe it's because of the current gasoline blend?
Thanks to everybody that posted, it saved me a lot of time, and trouble!
Hopefully this will help someone else!