ChevyAsylum has an Offy intake, with a 4 bbl, and headers, on a stock 292, 4 spd, in a '64 C10.
he'll be able to tell you the difference you'll feel, i think.
check the gallery, he has a link to his website where he has multiple pages of great info.
good luck, and later days.
.sam.
1969 K20 , with a '67 front clip. fleetside. 292, 3x1 offy, headers. sm465 4spd. getting put back together, almost ready for paint.
doing it all myself.
19 and lovin' it.
"proper" is so over-rated.
.later days.
.sam.