I had to pull the distributor to replace the intake manifold gaskets on my '68 Corvette with 427/390 hp engine. I marked the distrubutor and when I replaced it the car started fine but ran rough. No backfiring just kinda shook the car thought. If I advanced the spark it ran a little better then starte to run rough as I went farther. If I decreased the timing to a point I had run the car at before the repair, the car would stall.

Ok heres my dumb mistake, I pulled the distributor and set the engine to TDC so I thought, and reinstalled the distributor with the vacume advance pointing about 45 degrees across the enging, and the rotor pointing between the #1 and #8 towers on the distributor cap. When I tried to start the engine, all I got was misses and backfires. I thought I might be out by a few teeth on the distributor gear, so I pulled the distributor and turned it counter-clockwise about 3 teeth. Now I get no backfires but the engine won't start.

Any help would be appreciated, Thanks in advance,
Kevin