Mine's a Sonett V4. Little difference other than the engine, the bellhousing, and clutch actuation. 750 cc triple two-stroke and cable operated clutch in the Sonett II (1966 only, 256(?) examples built), 1500 cc 60 degree V4 four stroke with hydraulic clutch in the V4 (1966 through 1969, with 1649 built over that 4 year time).
Fourth in the video was an AMX, 5th was a Javelin. The AMX was set up as a street legal drag car. My interest that day was primarily a shake-down of my recently completed work, but that Corvair was a real distradtion for me.