Does anybody know the size of the fittings that go into the back of the intake on a 95 4.3 vortec for the fuel supply and return lines? How about a pic of the exact locations? Thanks

Just did the lines on my 96. The fittings are 3/8 inlet, and 5/8 return line. They are special o-ring fittings, like late model PS pumps have. You can get the fittings from an auto parts store, they're sold as fuel line repair kits. The fittings come on a piece of steel tube w/ the o-ring flare on one end & nothing on the other. I cut it to the length I wanted & put a regular double flare on the opposite end so I could attach it to my stock lines. The fittings should be located on the very back of the manifold, near the distributor.

The feed line is 3/8 but the return line is 5/16 not 5/8 as stated above the return line is smaller not larger. They are both available from the parts store as repair lines.

Jeg's has a kit to adapt to a AN-6 fitting. PN#310-74730 TPI Fuel Rail Fittings.

Originally posted by tubehead
Jeg's has a kit to adapt to a AN-6 fitting. PN#310-74730 TPI Fuel Rail Fittings.

Sweet! Thanks for the info.