So i start her up the other day, the 383, 1st time ever she runs very lopey, timeing was 35 with advance. ran fine, took it around the block, and the tranny was slipping so i shut it off and brought it home. So i go to start it today and the bitch wont start. she stays alive for a few seconds then backfires through the carb. i cant give it gas or it backfires, i played with the distrib, moving it around a little to get it to start, but it still backfires. i replaced the power valve in the carb, still does it. the fuel psi is at 7 psi, and the floats are fine. what could it be, the coil is getting spark. could the destributor be screwed up, etc?
all i wanna do is drive it!

 

Whats your initial spark set to?
Is it firing on all 8?
Black,white,blue smoke?