jon, i got the 134 air working on that 92 k1500. could not get the plastic bits all flushed out of the condenser, and figured it would just plug the orifice tube again so replaced the condenser. top nut was seized on the condensor, so new line. got a new delco r4, as 4 seasons and cwi did not have good reviews for holding up. cost $600 in parts plus supplies. book said 2.8 lb of r12. i had 240psi high side pressure after 2 cans so i quit. good cold air.

i got 2 new mastercool (85510) can traps with the check valve. couldn't get anything through either of them, even with my 134 gauge set, so i bought a tap without a check valve to get system charged. any ideas on that?