Early 70's electronic distributor

Not many engines got the transistorized ignition and magnetic pickup distributors before the '72 model year. (see 1972 MTSC here)
A '69 340 would be the higher compresion engine with four barrel.
I don't know what a 71 or 72 360 would have but my guess is a low compression and a 2 bbl and intended for a truck. So the ignition curves would probably be different.