Did you use all new ign parts on the rebuild? I would go out at night and see if you're getting a spark leak from a bad plug wire. With any ign misses I always install new fresh plugs and eliminate any chance of a bad one causing grief before digging too deep.
"when we were children, we are reborn every morning,but when we are older, a little of us dies every night, killed by mortgages, bills, dry rot, rising damp. When we travel, though, we are children again."