[70GMCer]

I am starting to get together the parts needed to bring back to life the AC in my 83.

It looks like the system had already been converted to 134 as there are the correct manifold connectors present, but I'm going to replace the orifice tube.

I need to know if the orifice tube for the R134 is the same as R12.

If not, anyone have the part number of the tube I would need?

I'm going to be replacing the dryer, hoses, evap unit & condenser as well as installing a Sanden 508 type compressor.