FWIW, I was just searching and found some of those old posts I did. Looks like I put together a decent chart of the possible cams. To summarize my long post below, it looks like there is a "stock" H120 cam and an H120 cam from Sunbeam Specialties (as measured by Cal Cams for Sunbeam Specialties). That Sunbeam Specialties H120 cam appears to be more like the E128 cam in opening/closing, but with a lower lift. My cam seems to be this Sunbeam Specialties H120 cam:
BTDC IN / ABDC IN / BBDC EX / ATDC EX
Holbay H120 -
Intake: 44 / 51
Exhaust: 69 / 26 Lift .436
Holbay (SS) (as measured by Sunbeam Specialties) -
Intake: 27 / 60
Exhaust: 62 / 25 Lift .47
Overlap: 52.1
Lob Center Sep: 107
Intake Duration: 268.5 crank deg
Intake Lobe Area: 26.49
Exhaust Duration: 266.5
Exhaust Lobe Area: 26.45
Holbay E128 -
Intake: 35 / 60
Exhaust: 60 / 30 Lift .465
WSM Chrysler -
Intake: 58 / 66
Exhaust: 84 / 40 Lift N/A
Elgin #6708 -
Intake: 23 / 65
Exhaust: 65 / 23 Lift .433
Delta L2 grind -
Intake: 22 / 63
Exhaust: 63 / 22 Lift .438
Isky SB-2 -
Intake: 22 / 62
Exhaust: 62 / 22 Lift .430
Stock
Intake: 29 / 63
Exhaust: 69 / 23
I also found my own old notes where I tried to measure when the valve started to move and stopped moving - just from marking the crank and visually watching the drivetrain. The opening numbers fell within the range of the others - closest to the "Holbay (SS)" that Jan measured. But the final closing spots were longer than all the others:
Intake open/close: 25 / 84
Exhaust open/close: 62 / 40
I also noted the mid point that the valve was fully open: Intake 87.5 ATDC, Exhaust 11.75 BTDC.
I have obviously no faith in the accuracy of any of these numbers! I'm looking at my calculations to convert from where the crank pulley was to the ABDC and the ATDC for the valves closing. I'm thinking that I converted the opening spots right, but must have flipped something on the closing spots. I don't know if I can resurrect the results from my notes and fix it. But next time I adjust the valves, I'll try to measure the closing spots again. But if that mistake is true, that does more strongly suggest the Jan Sunbeam Specialties H120 cam measurement, which is closer to the E128 cam than the "stock" H120 cam, with less lift - don't know about the peak/duration.