i emailed this guy on ebay for what he has and i got this response.

There are two cars. The blackone which is the car in the auction has a bad motor with a good rebuilt transmission. I have another z34 which is red and is a rare 5 speed manual. That one has a good motor and a bad transmission. I will take 800 for both or 400 apiece. Thanks  David Garner  314-956-1470

good deal or not?

I would but the 3.1 has it limits and i really like the hp in the dohc. I have a 3.1 in the sunbird but no boost, it was fast but handled like a tank, body dipped too much in the corners, more bang for the buck with the 3.4dohc swap, boosted especially.

will do, i think a 3.4dohc 5spd on the w-body platform will be very fast, i plan on boosting it with a turbo off my buddy's blown up supra, has front mount intercooler too. Would that be too over the top in a 2500lbs car?
I'll be sure and post pics of us hacking and gutting the gp. Like i said if anybody needs some parts just come on down and pull it. Less work for me.

im looking to get mine to around 2500 or less if possible, for dirt track racing

sorry the one i have isn't pwr

what is the difference between the two trannys?

i was told the same thing, but all the emission stickers say exactly what is under the hood.

i bought a 92 gp from a local salvage yard for 300, it has a 5spd 3.1v6. Now i have been told that the tranny was a hm-284, i don't know how you can tell the difference between the 284 and 282, also if anybody wants any free stuff just come on down and strip it, everything has to go anyways for the track, the motor is being replaced with a 3.4dohc, any suggestions or comments are appreciated.