Serious Q: Re: Carbs., Running moderate cammed 350 SBC Options

[Dr. Roger]

Got two vac secondary carbs (600 cfm smog carb and a 750) which I now know are in need of rebuilds.

The 600 runs but, on this heavily cammed engine, like *hit. Idle circuit has very little adjustability. And it's got more vacuum ports than I can count.
The 750 is a bit too much I think for the 350.

I've run 650 double pumpers with great success and am thinking about installing a 650 spreadbore. Small primaries/large secondaries.

Goal here is to keep higher velocities off idle for responsiveness and, due to engine displacement, not over carb it like if I used the 750cfm. 6K redline...

I'm about ready to go the the local parts place and plunk down some spare change on a new 650.

WWYD? =-))

Roger

Pic is the 600 smog carb....... Come hear it run.... Swap ya' for that old 650 dbl pumper..... =-)))