350 GM Crate Motor questions for a 66 C10

[geezer#99]

Quadrajet is fine but you need to watch the pressure output on the electric pump. Safest to use one with a max of 5 psi. Then if you change carbs in the future you’re covered on pressure. Edelbrock for instance are pressure sensitive.
And to make your electric pump happy you might need a return line to the tank. They don’t like to be deadheaded and can overheat. A return style regulator helps for that.

If you use your quadrajet with a square bore intake you’ll need an adaptor too.

Everything’s adding up. It’s the snowball effect.
With all the extra parts needed to use the L31 then the 195 hp 350 starts looking pretty tempting.