I just got done replacing the Head Gasket and finished hooking everything back up. I was VERY carfull to keep everything on TDC. It ran when I tore it down, now nothing. I put the crank at 12:00 and the cam at 12:00 then put the distrubutor at #1. I've done this 3x now and it has been correct all 3x. I've found out that if I mash the gas pedal to the flool the truck eventually "starts", It's really rough and quickly dies. It backfired at me so I stopped tring to diagnose it that way. This is really making me mad. The timming is close enough then it should at least run. My dad said that the first time he went to start it, it ran for 30 sec. but it stopped. We haven't been able to start it since, it just spins. All of the lines are hooked up.

Any thoughts!