I just got the 305 running for the first time in my 81Z. I set the timing, car wouldnt start. Fuel leaking from the carb (Q JET). Rebuilt the carb, first time I hit the starter, fired right up and ran. I ran it for about 5 min, shut everything down, no issues. That afternoon started it up again, 1st time go, ran for a few minutes, no issues, shut it down, checked the oil, tranny fluid, coolant, and started it again, no issues, started to get a little hesitation, then it died, now it wont start, it doesnt cough or sputter or anything, just cranks over. I have the wiring harnes from a 79 installed and the Q JET is from a 75 so there is no comp controlled stuff in there. Any ideas and how should I go about troubleshooting this.