probably 180 deg out on timing
AnswerSounds to me that your vehicle is off time. Check the timing on it. If the timing is off it will backfire through the carb and also if it is cross wired (firing order wrong) it will backfire through the carb.
It backfires because it's lean. The trick is to figure out why. Check your vacuum lines and anything that could obstruct fuel flow.
Spark plug wires incorrectly connected or it is way out of time.
Too much fuel pressure. that typically happens when needle valve (carb pressure control) is blown off the seat.
it's lean
Yep.
you can check the catalytic converter it may be plugged and cause it to backfire through the carb
A fire in the carb.
It's lean. You have to figure out why.
As with any engine, timing, and also carb problems.
You will have to look on the carb and get the numbers on it and then go to the Edelbrock website.