The 350 is coming out of a 89 gta 350 with a certificate of destruction that was an automatic car but my 91 is a 305 with a 5 speed manual, I was told I wouldn’t be able to get the 350 tpi to run with the manual car? Anyone know anything about this?

the car will run with a manual transmission . However you will benefit form a custom tune.
Is the 91 tbi or tpi ? If it’s tbi I would add the injector pigtail and repin the ecm to a 1227730 ecm.
If its tpi already just get your memcal reprogrammed. Here is a thread on the 746 to 730 ecm.
https://www.thirdgen.org/forums/tpi/...d-density.html

it’s tbi, any chance you could email me the specifics please?

the repinning from tbi to tpi is all on the linked thread.

Ok man thank you so much!

would I use the ecm in my 91 for the 305 tbi or the ecm from the 350 tpi

You could also find a harness from a 90-92 tpi speed density by posting a ad in the classifieds section.
If your not confortable repinning the ecm connector. Here are the connectors needed. If you need a ecm and or chip if you do decide to go speed density send me a pm for reprogramming and possibly a ecm if I have one at the time. I do have one right now.
https://www.ebay.com/itm/90-92-Camar...QAAMXQgb1RPrM4

Tpi maf can be done with the harness you have you just need to double check the firewall connectors pinout. This connector is called c100.

You would use a 1227730 ecm from a 90/92 tpi.

C100 pinout here so you can see if they are the same or different.
http://www.austinthirdgen.org/?pid=19