Hello, If anyone is interested, I went to a local u-pull it, and saw as of yesterday, a 1950 Buick, pretty much stripped, but still parts left. gopullit.com
It's called the propane enrichment test, which involves removing the burner off the valve that goes on the tank and installing a hose (a tight leak-proof connection) with the engine running AND CHECKING FOR NO SPARKS, crack open the valve and run the hose around carb base or anywhere a leak could be when the idle increases that's the area of the leak. It could be dangerous though.
The 327/300 HP engine should have a Carter AFB, instead of the Rochester 4GC. Of course, the intake is different but it also has larger runners? The intake valves are bigger, 1.94?
I bought a '68 Chevrolet C-10 (1/2 ton) LWB w/ standard transmission in the late '70's, the first problem I encountered was the gear shift becoming jammed and not being able to get the transmission in gear. I remember took the truck to the local Chevrolet dealership, and they rebuilt the column. The shift levers @ the transmission have plastic bushings that can wear out. These trucks have a coil spring instead of a rear leaf spring suspension, may have to replace the springs and/or add air shocks.
Nice Vette, but not a '70, mid '70's '74-'76, I doubt one from these years would have 350 hp with a small block 350 w/automatic from the factory. If this car is original.