Got a Holly carb. Took off of 350 Chevy engine. These are the no.s 6R-6910 B On the choke tower is 1850-3 then under that 0310 The holly chart shows a 800 cfm. but not sure. Its has choke. Need to know what it is. Any help appreciated.
The list number would be the 1850-3 number, is my guess. The 1850 model has been around for decades. Vacuum secondary 600 cfm does it say LIST 1850-3 ?
that's strange....the 1850 is a square flange carb, the Qjet is spread bore. Something doesn't sound right here.
My Holley OEM spec book claims that list #1850A (there isn't an 1850-3) is a model 3160 or 4160, square-bore, from a '58-'61 Lincoln 430", '58-'59 Merc 430", or a '59-'61 T-bird 430" engine. Squirrel's right, something sound off-kilter. Roger
My 1990 holley book lists the 1850-3 The dash numbers are revisions. although holley gave up on the dash numbers on the 1850, and the current versions of the 1850 are 1850C and 1850S for Chrome and Shiny finish. They don't have externally adjustable floats any more either.
The Carb is an 800 CFM Spreadbore more specs here:http://www.elcaminocentral.com/archive/index.php/t-49638.html see post by lockjaw put R-6910 in Google search lots will come up.
One of the best Holley carbs I ever had was a vacuum secondary spreadbore. Internal needles. The 1850-3 IS confusing. peace
Holley 1850 is the most common Holley ever made. It's a basic square bore 600 cfm carb. The -3 is just as Squirrel said revisions. No real changes what so ever. Just application.
Squirrel.heres some pics. I went over and looked at the guys manifold he said he had it on and he did have an adaptor plate .
The Jalopy Journal
