sorry,
i just re read your post and see that your 123 car is a '79. i believe most of my objections probably do not apply. the brackets for the ac should be the same. i don't know about the transmission. be sure to look at all the details to be sure you know what you're getting into. it might be pretty good.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.