Intake opinionz....

those old single plane intakes had small ports and gave ok low speed power.

if anything a 500 afb carb I would put on and leave the 273 intake on it, the 650 will sell easily.

Folks put intakes like the RPM for more power, not so much better low speed power. Since you want a 2bbl it be better to just have a smaller 4 bbl. Motor will run sweet with the right cam,