First, thanks to everyone for your advice I really appreciate it.
Been playing around with the valve adjusters. Making the push rods as loose as I could (but still seating)then re-tested the compression and here are the results:
1: 70
2: 65
3:100
4:105
5:110
6:115
I double checked and definitely have a strong spark on all.
Next, I'm gonna try Carl's idea and put some 5-10 psi of air into the cylinder using the lower portion of the compression tester and we'll see where it leaks out from. I'll let you know
