I did, and its a great baseline, cubes X rpm = yada.........but a Hemi is a bit different in its air and fuel needs. I have run as big as an 1150 dominator on a 431 cube hemi on the street, and it was actually a decent carb over a bunch of others I tried. On that 431 hemi, the best setup I ever ran was a set of dual 750 eddy carbs with all the choke stuff removed on a rat roaster with a 1" lid spacer, and 1" carb spacers and all the internals modified. That was the only setup that beat the old school dommy.

An 850 on a Hemi is pretty restrictive and will actually run out of breath at 5k on a 484 Hemi. On a 440 mild stroker, an 850-950 is about perfect, but on a Hemi with heads flow typically +380cfm out of the box, its a big restrictor. even with a mild cam. Think about it, they put dual 600's on a stock stroke 426 hemi......Now a days we are putting dual 800's on the 540 and bigger hemis....They like big carbs, they like fuel, and they like air.....More than the formula accounts for.

I love tinkering with carbs on engines. I can typically find the best jetting and timing with most combo's....But for the 484 Hemi, I gave you the best results we have found with more than 20 years of messing with them. The 1050 Proform 4150 is a beast and one of my favorite out of the box carbs. We have tried a lot of carbs over the years. The only one I would like to try again somtime is an SV1.....The one I had, I did not spend enough time on it before I sold it, but I think I could have eventually got that to work really well. It showed some nice promise, especially in the idle circuit.

On anything not out of the box, I call Dominic at Thumper carbs and we discuss it. Even on my little 512 400 stroker, I think the 1050 custom Thumper dommy might be restricting us a little. Wish I had more money, cause I would have a shelf full of carbs.