[lt1_fd3s]

i've done a few auto-5spd FD swaps. as for wiring, the only thing i did was swap over the speedo sensor in the transmission because of length of pigtail on it. and there was a little black box that sat behind the computer I removed (with keeping the box, car ran fine, just would back fire nearly every time i turned it off) other than that, i used the auto-engine harness and auto computer. the portion of the harness for the that went to the auto trans i just zip tied up out of the way.

if you are set on using the manual engine harness, then you will need to play with the X-14 connector that goes between the Dash harness and the engine harness, since the auto X-14 is a bit larger. this harness is located up in the dash just near where the the engine harness comes through the firewall on the passenger side.

i did do the swaps a few yrs back and that's what i remember about differences. if you want, you can PM me and i can share my experiences or ask me here if you want. I also do have the mazda wiring diagrams that show the harnese and connectors so you can compare the auto and manual stuff, if you want to PM me your email.