Changing the system to the later 94/95 system would solve the leakage problem but will not be easy or cheap. The 94/95 is a completely different design. For instance, the new system has a suction accumulator in the low side for excess refrigerant and the older system used a dryer/receiver in the high side. The new system is a orifice metered system and the old system used a thermostatic expansion valve.
Long story short ... the entire system (including compressor) will need to swap.

What I would do to save money and work is have all the hoses remade using modern materials, the compressor upgraded and O-rings/connections replaced with R134 compatible types. The R134 will cool using the older design but it will only be about 70 to 80 percent as effective.
Still it will save major bucks. Have your evaporator and condenser coils pressure tested to be sure they are leak free as well.
My 2%


Last edited by CatFish; February 07th 2019 8:51 pm.