[Ironhorse]

Turbo85GMC, Found the exhausts and came up with these PN's. Went to the Chevymainia website and found this info:

RH 3872778 66-68 Corvette, Passenger Car and Truck: fits 283, 307 & 327 195, 200, 250, 275, 300 and 375 HP 2" with A.I.R. tube fittings

LH 3872765 67-71 Corvette 300, 330, 350 and 370 HP 2" with A.I.R. tube fittings

All the fitting threads are good with plugs fitted except the two center fittings on the right hand exhaust. For whatever reason they have been welded shut. Don't think it would be a problem unless doing a "correct" points restoration. Left hand exhaust has accessory mounting boss.

Any questions you have will do my best to answer. Guess I learned something about the Corvette factory cast exhausts.