The most important part you need is a good converter. 3000 or higher . Some 904's in 71 and newer had 3000's . I just got lucky and the trans I put in the brown Duster has one. It was pulled from a 73 Charger with a 318 and brake stalls at 2500 .
With a 904 and small tires 391's will work. Put a taller tire on it to street drive it when not at the track. With your combination some tire spin on launch will be good. Most of the time big tires look good but are not always the best choice.
The weiand intake and 750 carter is what I have on my 318 it works great, Your double pumper? Square the carb at the transfer ports and drill holes in the venturies to get it to idle. Do not use the idle screw to raise the idle above the squared port. If the idle is high you can lower it but never go above square in the throat. You will need to do that with that cam choice for better bottom end torque .
Just a couple tips you may want to use.
Stock 318 motor
View attachment 1715421416
View attachment 1715421417
View attachment 1715421418
