[Jim Vander Wal]

On my 427W I run a 780cfm from ProSystems. 4150 Dbl pumper, no choke or horn. 1-7/8" custom built headers and limited restriction sidepipes. Edelbrock Vic Jr., AFR 225 heads, Comp Cam custom grind 240 at .050, .610/.613, 108. Didn't like sub 2k RPM but would run very nicely at 2,200. About 535hp/tqe on an engine dyno, 440/435 on a Mustang wheel dyno (would be about 475 on a DynoJet).

My experience is similar to Tommy's. But I'll add that chokes are really unnecessary, in the way of a good air path and air cleaner options.

I've tried a similar 940. Wow!!! did it scream at 7,000, not so hot under 5,000. Also tried 2" headers with similar effect.

Sold the 940 carb. Told the friend with another 427W that bought it that it was too big. Took him a bit to believe me before he sold it.

If I was going bigger it would be a Holley Ultra XP 850. Would like annular boosters abd would do this knowing that I will give up some low-end response and if switching to a Eldebrock Super Victor. But, I run to 7k RPM. In any normal world the 750/780 is great.

Right now the plan is for the Vic Jr and PS 780. Not much future in messing with the combo that works. Need to build new headers for the Challenge Car.

Jim