Need info on Holley 94 carb setting on Merc engine

[wjfraser]

Hello Barners. I need some assistance.

I would like to replace the stock 855 carb and manifold on my 1950 Merc flathead (4 inch crank) engine, completely stock, with a completely rebuilt1950 Ford Holley 94 8BA carb and manifold.

Merc is 255 cubic inches and 1950 Ford was 239 cubic inches.

Any changes that I should be aware of for the change?
What jet numbers and power valve numbers should I use on the 94, in order to compensate for the increase in cubic inches?

Any other things to take into consideration?

Thanks for assistance. Bill