[niles]

Keith:
checking compression; is like your blood presuure; it's the most important test you can make.
It's a guage that screws into your plug holes and you turn the motor over with the starter and measure the psi of each cylinder. You could be dragging around a dead cylinder; that would explain your low dyno reading.
Should be within 10 psi of each other; your engine should be around175 psi; (any good values from people with similar engines?
If you need more info/detail - email me
gn