Sell the r12$$$ and get some ES12A( you will need 134a fittings) .I've run it in my 93 for about six years now and I can definitely say it works as good as the r12 and better then134a. First 110 degree day with it in my93 , after sitting outside , after work I turned it on and drove for five...
I set up
My 72 Monte Carlo with 411 gears in a twelve bolt with moroso.carrier and Moser axles. The 700 r4 with lock up.converter made it a daily driver( for me anyway)
My stang was ordered with 308 gears from the factory, last 19 years( minus last ten months )(health) I have driven the :poo: outta her. With the t5 in fifth gear I crisis hyway at 70-75 mph and it spins at 2'000 ish rpms.
Your o.e.m. uppers are the weak link, cause I've been side stepping my clutch for years without any hop, I've got metco adjustable uppers and lower arms with greasable bushings.
Ftw go electric, I've had the flexalite Black magic extreme fan on my daily driven 93lx for 19 years so far.
Oh by the way I live on the surface of the sun( nevada)