Repop Fentons are no better than properly split stock manifold & splitting is cheaper too ~ retain the heat risor flapper for good cold weather warmup , Fentons you gotta plumb in exhaust heat , poor fittment problems caused by crappy quality control etc. you decide .
Rochester 'B'series carbys are dead simple and easy to fix adjust and so on , carbies DO NOT got ' out of adjustment ' ~ _ever_ that's just not so .
Properly set up , dual carbies will _always_ provide better fuel milage and power as the fuel is more accurately measured .
Folks who know , will says do it , folks who don't will say it's bad . bigger carby (2BBL) in center of manifold doesn't meter fuel evenly to that long engine so middle cyclinders run richer than end cylinders , faster yes but not such good
drivability as multi - carby set ups .
There's a page on The Inliner's site about modifying the Rochesters for maximum effect , I know lotsa folks just ensure the jets & such match (critical) then plop 'em on , balance and GO .
I say DO IT & have fun ! .
