Just a update, I converted the ls400 and tried a new snake oil called "maxi cool" by interdynamics. I was getting 55.6f prior to installing it and shot it in, it went to 42.3f. Not bad, keep in mind this is a car with a less than new compressor and all r12 components.
I'll try this stuff again on the next conversion (83 300sdl) and let ya'll know the results.
BTW, I found the stuff at Advance Auto Parts.
Project Smoker, '87 603 powered wagon
Hauler, 96 CTD can you say torque?
Toy 73 Cougar xr7 convertible
Acme Automotive Inc.