Misfire at cruise, popping/afterfire at 3000RPM

Well, FABO has not disappointed once again. Thank you everyone for the great info -- most of which I'll have to come back and read when I can take the time to comprehend it. I'm pretty new to this and it takes a couple or three times to understand the technical information.

In the meantime, here are the numbers from the compression test. I'll be moving on to the leakdown test now.

CYLINDER

1 150 150
2 155 155
3 150 150
4 160 165
5 155 160
6 165 165
7 145 145
8 180 175

Cylinders 7 and 8 are the odd balls.