Reply to "My engine strarted popping last night."

Backfire through the carb can also mean bad plug wires that are misfiring / crossfiring. You really need to start with the basics and work your way up to the more complicated reasons. Do an electrical tune up with new cap, rotor, points (if you have them), wires & plugs. That way, you know these are good. Check all of your vacuum hoses and make sure they are not old and cracked, and any open ports are capped. I recall your brake booster is gone, so that big port should be capped at the manifold, along with the little port on top of the big nipple.

Set up your bulkhead so you can pull it in a few minutes so that is not a deterrent to maintenance. The seat belt bolts can be the only thing holding the decorative cover, and the steel bubble can be held with only a couple of bolts. 5 minutes and your covers are off.