[-=Jeff=-]

with a higher Head pressure (albeit not too much) I noticed is will drag on the motor a bit more. Another thing with R134a and our cars is the ZR-1 specifically does have a a bit more work for cooling, ours cars have a 10PA17 compressor while the L98/LT1/4 have a 10PA20

that with a warmer engine compartment will not help the ambient temperatures and high side pressure. Since you have a leak and R134a is easier to get then I would go that route, but if Marc finds the Condenser to be leaking you may want to consider replacing the condenser with a parallel flow instead of the tube and fin (the parallel flow was in the 94-95) this will help with 134. I have a parallel flow in my 90 but I am running R12