Holley high flow mechanical pump. 650 double pumper with a proform main body. My wideband o2 took a crap, but it likes a fatter jet. Last Friday I had it at 74 and 87 now it's at 78 and 92 with a 6.5 pv
The large jets doesn't surprise me with a 650dp that has had a Proform main body added. My carb is the exact same thing (started with a 650 dp, and added a 750 Proform main body), and my jetting I normally don't post because people jump all over me and tell me I have WAY too much jet...but I've done a LOT of testing and my car makes the most power with my current setup (82/92 with pv or 91 square without pv). With all that said, you might have too much jet, but here is the best way to find out.
Go to the drag strip, set your jetting back to what came with the main body kit and make a pass (which is 72/84 if I recall), looking only at MPH at the stripe. Repeat just to get a good baseline. Jet up 2 sizes (74/86) and make another pass. If your MPH goes up then keep jetting up until it slows down, then back up to the best MPH jetting and you're good. If it slows down right off the bat, then go the other way (take away 2 sizes until it slows).
I think the reason this carb setup uses so much jet has to do with the size of the air bleeds on the Proform main body...but I could be wrong (I'm not a carb expert).
Good luck....by the way, I'm still using that carb, works great on my 10 second street car.