1 do you have the transmission currently?
1A open to suggestions?
2 willing to run a hyd clutch vs mechanical?
how much HP do you plan on running? 3-400 range and 3500lb curb puts your roughly similar HP/LB as most current sedans
3650 5sp can be done, common in the 01-10 mustangs probably cheapest but that's my knowledge extent.
TKX 5sp or T6060/T56 mag would be my strong encouragement having the ODs allow for longer cruises and easier traveling. especially once HP is 3-400hp
Sick speed Monty has a nice pedal
Tick performance has nice hyd MC setup
Three pedals is very nice but also ~1000.00
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’78 – ’88 GM G-Body Pedal Assembly – Three Pedals
Our integrated clutch and brake pedal assembly is the key to getting a manual transmission up and running in your 1978 - 1988 GM G-Body. If you're looking forthreepedals.com
One thing to add here:
If anyone here wants to go with the SSM pedal assembly, go with the universal master setup, especially if you’re going to do some spirited driving or competition.
The F body master cylinders are notorious for sticking and not moving enough fluid, and I personally don’t trust stock replacement quality right now either.
I bought a F body setup SSM pedal assembly second hand, and I’ve been kicking myself since because I didn’t know about the F body clutch master issues. It’ll run an extra $400 to get a master cylinder adapter from a place like Tick Performance.