Looking at it the one on the right
Suburban
r12
they are 4 by 8
YES.
The Low side line attaches to the compressor on the driver side of compressor. The charging port faced forward. The high pressure port faces up.
In side the fuel tank
To set the timing on a 1994 GMC Suburban you need to warm up the engine while the car is either in park or neutral. Next, you adjust the distributor until the timing is set to where you want it.
Yes. It's very easy.
Click the link.
Fuel pressure regulator is located on the driver side fuel rail.
There is an adapter that is put in place of the fuel filter that has a test port that the fuel gauge hose will fit too. Might be able to get one from a parts store.