Man, lots of info to crunch here. The block number 9799916 says 1970, 350cu. The date code on the head J139 says it was cast December 13, 1969. Correct for a 1970 engine. The YU says 255hp 8.8 compression 2 barrel 350. But that 17054905 carburetor number is from the twilight zone. 1705 means after 1975. 4 means 1984. 9 is not a normal division, maybe a truck? 0 is Chevrolet, and 5 is manual transmission. Is the fuel line on the passenger side? Chevrolet. Electric choke? 1980 and later. [ I upgrade all my Q-jets to that]. All Q-jets 1981 and later were CCC computer controlled except for trucks up to about 1985. WOW my head hurts. The schraeder valve in the trunk was probably for air shocks. There should be plastic air lines going to each rear shock area. Still there? Not leaking? Amazing. The HAYES Stinger Magna Pulse was a points eliminator electronic ignition system. Back in the day, GM HEI was hard to come by. Lots of companies produced points eliminator systems. If it works, great. If not, a GM HEI is EZPZ to pop right in there. You just need to replace the 6 volt coil resistance wire with a fat 12 volt wire [pink wire]. Here is the Stinger wiring diagram. Can you take a pic of the top and front of the carburetor?
