After receiving a litany of abuse from fellow hot rodders and mechanics about my lack of pneumatic capabilities in my shop in the past, I decided once and for all that it was time to get real and set ...

In '80, Pontiac introduced the new R4 A/C compressor to some of its Trans Ams and Firebirds. Weighing in at nearly half the mass of the long-in-the-tooth A6 compressor, the R4 continued in the F-body ...