Freeze 12 vs. 134a?

[72seeten]

I't's starting to get a little warm here. I bought this truck 6 months ago(1972 C10), and I just got around to putting the belt on the A/C. Needless to say, compressor turns, but it never gets cold. PO said it worked before, but I guess that's what I get for buying a non-running truck, haha. Now I am debating doing the 134a conversion or trying this freeze 12 stuff.

Anyone here had any experience w/ Freeze 12? "Google" came up w/ some mixed reviews. I know the 134a does not cool as well, and was wondering if anybody had any experience w/ the freeze 12, and what would you recommend. If I do the freeze 12 I would probably try to find the leak, charge it, and be done w/ it. (hopefully)

I know w/ the 134a you would need to flush the system, change the dryer and special POA valve correct?

TIA,

Steve