Holley/Demon Carb stumble

OK guys, i feel it's time to put a period on this thread. The Demon is as tuned as it's going to ever get with out a 50 cc squirter, and then it is still TOO BIG!!!!
However, i feel that there need to be some facts put out here for any one who reads threw this thread trying to fix a similar Problem.
First the 1.75" Proform base is a good replacement piece for the 850 Mitty Demon, and the smaller main body(designed for the 1.75 butterfly's) will fit with no problems as long as you pay attention to the gasket holes...................BUT/HOW EVER....... THE IDLE AND HIGH SPEED "AIR JET" IN THE MAIN BODY ARE NO WERE NEAR CLOSE ENOUGH TO US WITH THE MITTY DEMON "METERING BLOCKS". Also with the smaller booster/bore you can't just measure the Mitty Demon idle and main air jets and put them in the Proform main body(i never attempted to do this and might have got me closer) But by the time you have got this far with TOO BIG OF A CARBURETOR IN THE FIRST PLACE. I't will be way cheaper to just buy a Proform 750 double pumper and be done with it.
If you have more cube's or are revving it much higher them me......the 850 Proform might be a good idea. Other whys just by a 750.
Remember the the Mitty Demon is actually more like a 950 or 1000 cfm carburetor!!!

Final note if you have one of these carburetor or any Holley based Demon.......good luck!
I found several placed were the finish was not good and the main jets in the metering block had a thread burr just waiting to fall off and cause more problems, the metering slot in the bore of the main body had a sliver of alu just begging to fall in to the idle slot. And who know how much other trash i blow out the three time i rebuilt it.

If you get an opportunity to by one......Don't!
I will be starting a new thread with my 850 Proform after i have got the basic done like timing sweeps and jet/top end sweeps......or maybe i will just be happy with it at that point........

I thank each and every one of you that have helped pull me threw all of this. It has been a journey and i say again, THANK YOU!:steering::thankyou::thumbsup: