OK, let me see if i can explain what is going on......
I just had my ford 460 rebuilt for my jet boat. Put the motor back in the boat and no i am having problems with it starting and the back firing

It first back fired out of the headers and the carbs.. i mean loud as hell enough to give ya a heart attack... so i advanved the dist. clockwise and now it just back fires out of the carbs ( gas and flames). It does start but only for a second and then boom out of the carbs it goes. I have tried advancing the dist. more clock wise but that doesnt seem to fix it.. any suggestions or should i keep turning the distributor...


as you can see i know enough about timing to get in trouble.

thanks in advance for you help