slant 6 problem

hey all, back again needing dome more help haha. so i finally got my 75 duster started back up but now the problem is that she has a jump when idling. i replaced the distributor and she idles decently. but when slapped into. gear, she won't accelerate but, im talking 5 mph max and the engine gets super jumpy. could the problem be my carburetor? noticed a fuel leak.

Have you checked all of the tune up specs to make sure everything is correct first?

Including firing order.

sb