OK, here's the short question:

My question is this: Is there any reason NOT to use the '85 tranny in a second gen ITS RX-7

Here's the story:

I sent a non-ribbed box to a shop for forks and seals etc.... It was from an '87 parts car. Tech ordered forks and seals for an '87. Otherwise on the inside it looked pretty good.
Turns out the first gear fork is different. He tells me the only year that was different was '85 13B cars. So it looks like the parts car had a tranny swap done. So my question remains, assuming he gets the right 1st gear fork, is there a reason not to use the '85 tranny?

Thanks, as always,

Steve