Intake manifold questions

i ran one of these on a stone stock 68 318 with a carter 625. stock manifolds with a 904 behind it and some 2.76's out back. it was "spunky" on the street with tons of throttle response and could one wheel peel for blocks.

it definitely has a "ceiling" where it just flat stops making power.

i also ran it on the same stock 68 motor with an RV cam, headers and a holley economaster 4bbl. it was a hoot to drive around and got good mileage on the highway.

unless you were building a low-rent pound around out of the change you could scrounge from the couch cushions, and already had this, there's better options around.