Similar setup to mine so this might help:
Cleveland and dyno experts
Your motor sounds down on power for some reason. I don't know what other components you are running so I will just let you know that I am running a toploader and a jag irs.
The CHI heads are GREAT! If you go that route, use the cam they recommend.
I have changed to a blue thunder intake, added a msd 6al, 650 speed demon with a matched 1" four hole spacer and the crane 524422 from the specs in the above link. I has not been on the dyno since but I know it is running stronger then before.