I have the same feeling - just leave it as it is and wait to see how it works. Its an old single cab truck, so 40-45 degree air cools it down fairly quickly. All the vents are flowing well, but I do need to verify that the vacuum doors for the max/recirculate setting are working properly. Another qu...

I have a 1975 GMC pickup with a hybrid system (old and new components) and I've just evacuated and charged it. The temps look good, but since I can't really follow the OEM recommendations for R-134a, I'd like some feedback on pressures and whether I need to tune the R134a charge. Original R-12 charg...

Years ago I converted my '75 GMC truck from the old A6 system to a Seltec compressor, parallel flow condenser, and Ford blue orifice that I purchased from Arizona Mobile Air. I also added a high pressure cutoff switch and had a local shop replace the hoses. It worked well for about 3 years, but afte...

I have a '75 GMC with the same original condenser setup. However, I converted to a new parallel flow condenser and barrier hoses, so I no longer have the original fittings for the condenser. FYI - I also found that GM made minor changes to the routing over the years. For example, I found a '74 truck...