[251]

Ive had both cars on a AMC V8, the Holley 2300 series are VERY simple easy to mess with carbs, I stuck the 500 CFM model inplace of my Motorcraft 2150 and it makes WAY more power, better driveability all around ( my 2150 was shot, to be fair its a good carb too)

lots of folks swear by that old Autolite 2100 carb..

they will bolt in place of each other, youll probably want a pretty low CFM rating, your 258 wouldnt ever use 500 CFM unless its built to the bonzo

ozarkjeep
1977 CJ5 looking for a Hard top near NW Arkansas!

 

[251]

I coundlt say for sure MUDDOG

there is a formula to figure Volumetric Effenciancy, we ran it a while back on the FSJ list..a 401 at 5000 Rpm used about 500-550 CFM ( numbers maybe off a bit, Ive slept since then..)

point being unless it was one HELL of a good breathing 258, I dont think it would ever use 500 CFM under about 8000 RPM...



ozarkjeep
1977 CJ5 looking for a Hard top near NW Arkansas!