A thing to consider is propane. Unlike 134a It can be used in lieu of R12 and is compatible with the original mineral oil. Also, unlike r134a it has the same thermal capacity as R12 so cooling performance is unaffected. People tend to get freaky when they hear propane because of the flammability but bear in mind you will carry 3 or 4 pounds of propane in the system and your gas tank has 125 pounds of also very flammable gasoline. It's dirt cheap which is nice because any stock R12 system with clamped hoses will slowly leak. You can do it yourself by buying those little freon replacement cans at any of the big autopart chains.
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My Break Away Squad
1969 Fbird (base OHC, 350, 400HO & Sprint Cvt’s - 400HO & TA ht’s)
1969 Custom S 2dr ht
1969 LeMans (2dr & 4dr ht & Cvt)
1969 LeMans Safari wagon
1969 GTO (2 Cvt, 2 ht & Judge ht)
1969 Cat (3 Cvt’s & a 2dr ht)
1969 Ventura wagon 2 seat
1969 Exec 4dr post
1969 2 Bonnie Cvt's & 2 wagons
1969 Bonnie Brougham (4dr ht & Cvt)
1969 Grand Prix 2 SJ’s
1969 2+2 2dr ht (Canadian)
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