bad coil ground?? missing badly after moving coil

switch the plugs around to see if you have a couple fouled/dead plugs.

otherwise you have ring seal issues or you dropped some crap on the cam and wasted a lobe or 3.

I mean...you say the compression is good, coil is new, cap checks out, wires check out, the only thing changed between when it ran good and started running like crap is the intake swap....