which carb would you run?
I don't undestand why you just don't Tune the Race Demon?
It's really a little too big for your application you should probably have used a 825 GC or the 875 RS model.
We run a 995RS on our 445 CID Dart at 9.70's 138 MPH, we tried to bump the sleeves to a 1050 and it slowed by .2. We had a 1050 Dominator on it and the best we ever got was a 9.94.
I just can't believe that a Race Demon 1000 or a re-worked 1050 Holley will be optimum on that engine, maybe for a Dyno pull which is worth the recycle value of the paper. In the real world when you bolt it between the fenders the smaller carb properly tuned will produce a quicker time slip.
We run a 650 Race Demon on the 318, properly tuned it gives us very low 11.60's/115MPH at 3100#'s.
My Buddy's 548" BB Chevy uses a 1050 Brazwell carb and runs 9.40's.
Our 451 utilizes a 825 Mighty Demon and runs low 10's...just some examples of carb to engine sizing.
Too bad you wern't closer I'd get that Demon dialed in for you. I can see what's wrong with it by looking at the Dyno sheet.....mid range and Hi-Speed bleeds are too small.