I am using an Ebelbrock 600 on my 312 and have had no issues of any kind with it.I would have preferred a 500 with a manual choke but the 600 was on sale--------.Todays retail at my local advance auto for the 600 is 324 dollars.I know you can beat that on the net.

Regarding sources for 4100's, we have all seen the on-line ads quoting remarkable prices but if you comb the swap meets, garage sales, etc., they turn up there too and rebuildable units are far more reasonable.  Rebuild kits are readily available and these carbs are easy to work on.  I'd  have a tough time rationalizing spending $500 on one but I admit I'm a cheap SOB who would rather do it myself and pocket the difference.

http://stores.ebay.com/GOTTA-FISH-CARBURETORSnever used this seller but there's lots to look at

Jeff: You might try a Mustang club for a 1.08 carb


Paul

I am spoilt for choices!  Thanks gentlemen.    I hadn't really considered a 4100, but I have had good luck with  a simple Autolite 2100 2 bbl. on the box stock 292 in my '56 F350 flatbed.

Jeff Davis

'54 F-100 - 272 Y Block 
'57 Tunderbird Colonial White 312 Y Block
'57 Triumph 6T 650cc - my other Thunderbird

'56 F-350 FORD factory Script  Stakebed Dually - 292 Y Block

Wellington, Florida

I'm with schlockrod & gekko13 on this one. Unless your out to do a bit of racing you can't beat a 4100 for the street. Like they mentioned simple & trouble free.

Dan      Kingman Az.      86409

I ran a new Summit 600 cfm vacuum secondary carb on a 300 inch Y yesterday and it ran nicely without any hic cups.  These are like a new version of the old 4100's.  Jetting appears to be close enough to run like it is and the idle mixture screws were spot on in their out of the box settings.  Pricing is very good on those carburetors right now which makes them a good buy.  Another choice would be the 500 cfm Edelbrock carb but those are roughly another $100 higher. Based on what I’ve seen with the Summit carbs, that would be a good carb choice for your engine.

Lorena, Texas (South of Waco)

I completely agree with the  Autolite 4100 recommendation.  It is simple, reliable, fairly reasonable to purchase (though knowledgeable people are buying them up and pushing the price up).  They are nearly fool proof and unquestionably 100% Ford. 

Have a new never been run 570 Holley street avenger for $300 + shipping. They are a lot more expensive than that but I don't need it at this time. Thought I'd put it on my truck hauler but the carbs to nice for that.Ph: 828-298-2197 or let me know here.

-Gary Burnette-

You might think I'm "nuts" , and because I'm old school, you can't beat an Autolite 4100 4 barrel.It's one of the best, simplest and troublefree carbs ever made. Get the larger venturi 4100, if your lucky enough to find a 1958 model that is 669 cfm. If not the big block 4100 is next best, with 1.12 venturi which is 600 cfm. Lastly is the smaller venturi at 1.08 used on 289 V-8 which was 480 cfm. Remember, unless you have a big breather and header exhaust, over carbing hinders performance. If you use a guide for sizing CFM, a 272 doesn't require 600cfm.

1957 Thunderbird 312 Fordomatic