i have run a lot of different carbs on that intake and here is what i found
carter 600,mechanical secondaries....ran good for years till it caught fire and i had to use my fire extinguisher...but it good power/bad economy
holley 390, vacume secondaries...not as much power as the 600 carter, but MUCH improved milage...best milage i found
holley 500 2bbl(with an adapter) this was by far the best power i found..throttle responce was terrific and milage was pretty good.. i sold the 258 last year and a friend still runs this set up on it.,...
i also had a mallory dual point distributer, accel super coil, and the motor was .030 over
hope this helps
carter 600,mechanical secondaries....ran good for years till it caught fire and i had to use my fire extinguisher...but it good power/bad economy
holley 390, vacume secondaries...not as much power as the 600 carter, but MUCH improved milage...best milage i found
holley 500 2bbl(with an adapter) this was by far the best power i found..throttle responce was terrific and milage was pretty good.. i sold the 258 last year and a friend still runs this set up on it.,...
i also had a mallory dual point distributer, accel super coil, and the motor was .030 over
hope this helps
