priming the oil pump

I was able to find 90* before top dead center coming up on #1 compression and was able to prim and get lots of oil like Old Faithful..., so the pass side rockers have oil.

The driver side is another story, since i don't have a degree wheel or know how far 20 degrees is, it's a matter of guessing how far to go to find the sweet stop.
When I put the wire down, it goes to a dead stop and won't go any further...
Now I'm thinking this is an assembly issue and not an issue with the pump priming.

Thanks everyone for you input.
I've done it for years just turning the engine "a little bit" at the time until I got the right spot. I feel pretty sure that's probably what it is. 20 degrees is real simple to figure from the timing tab itself. Just remember, you're talking about #6 compression, not #1, so that may be throwing you off.