'73 318 timing issue maybe? Really need help

RedFish said

Jumped time is slang for timming chain skipped a tooth or two. Loosing the relation between crank and cam causes backfiring at tail pipe and/or pop back through the carb. Lets not go there yet though . Could just be flooded.
Block the choke butterfly wide open , hold the throttle to the floor and turn it over. Dont pump the pedal. That just floods it more. Results ?

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The timing chain in my '70 318 jumped a couple months ago and it SUCKED, to put it lightly. Definitely swap the timing set out for a good double roller set A.S.A.P. Before it happened to me, I had to run almost 14* initial advance to keep it from backfiring and stumbling badly. Part of it was also the POS Carter BBD carb and sunken valves, which you could also have depending on the history of the engine. Hopefully it's not that extreme, but sometimes reality's a *****. You should really get your hands on a timing light, as timing by ear is not a very good idea.