NJFBOA - Home of New Jersey's Camaros and Firebirds

So I yanked the airhorn off my 86 regal today to put a new tps in it. I've done it before and last time it ended in failure and ended up with me putting a mechanical carb and dizzy on my monte ss I got so pissed off.

So Im trying not to make any rash moves here with this car because I'm trying to just daily drive it but as careful as I was this goddamn thing is just being a gigantic piece. I had the tps in, everything aligned, the needles in the whole nine yard. I adjust the tps and the thing idles beautifully.

Put it in reverse and the second I hit the gas it dies. Rev it in park no problem...

I'm looking for either some insight on wtf it could be or the name and number of a guy that will rebuild, and properly tune the electric carb for a reasonable price...

PS: No vacuum leaks, got 20 in of hg at idle and I sprayed the crap out of it with carb cleaner just in case...