LA360 initial timing too high - are there different timing covers?

Its not polarity. I'm using a pertronix ready to run disty. Only two wires, red/black and they are correct. I dbl checked rotor position, and at TDC the rotor is pointing at #1 (I had checked that early on, but a lots happened since then and needed to refresh my memory).

Now for the good (or not so good part). I checked compression on all 4 cylinders of the drivers-side bank (just easy to get to). All 4 read right around 100 PSI (95-107). Choke plate was open, as well as throttle plate. This is "dry", but it was running 2 days ago... Just too much cam for stock compression?