[benoit454]

Man you don't need rods and jets, the mixture screws are right on the front of your carb, they'll lean it out or rich it up whichever you need.

Also you maybe getting black smoke from the cats if you have no mufflers, and they might even be clogged up, if you don't have to pass a sniffer test I poke them out, just gut the cats out and then you'll have no worrys of them ever plugging up. However it'll be ALOT louder with gutted cats.

We drove our 86 down to get gutted cats and nw pipes with just headers, and cats, no mufflers and it was quieter then my monte carlo which has gutted cats and glasspacks.

As for expensive rear gears your should find some in a junkyard or on here who is parting one out, then swap the whole thing or swap the gears and carrier out. I did that on my car, first one I ever did, bought the guts online shipped for $75.