Looking for a bit of advise. I have searched the forums for hours and am still confused as to which alternator to get. Ive got a 79 FJ40 with a 2F, and a vintage air system. I am currently running an internally regulated alternator, I think it is rated at 50 or 55 amps. Im looking to upgrade the output because I had an issue with a drop in voltage after driving with the A/C on in the Georgia summers. Has anyone installed one that fits the mounting bracket?