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vin63 · 12-10-2008, 07:24 AM

I ran a 4 barrel, vacuum secondary, electric choke Holley 390 cfm carburator on an Offy 4 bbl intake on my 194ci L6. I routinely got 18 mpg with a lot more power available if I got into the secondaries - it would be even more responsive on a 250ci L6. I'm not sure if this is something that even factors into your selection, but I found the 4 bbl carb was a lot more efficient than the single and 2 bbl carbs that I had tried before. If you're interested my combo is for sale.

12-10-2008, 07:24 AM	#2
vin63 It's Better With Nitro Join Date: Apr 2008 Location: Chino Hills, CA Posts: 2,262	Re: which carb to use on 6cyl I ran a 4 barrel, vacuum secondary, electric choke Holley 390 cfm carburator on an Offy 4 bbl intake on my 194ci L6. I routinely got 18 mpg with a lot more power available if I got into the secondaries - it would be even more responsive on a 250ci L6. I'm not sure if this is something that even factors into your selection, but I found the 4 bbl carb was a lot more efficient than the single and 2 bbl carbs that I had tried before. If you're interested my combo is for sale. __________________ 1963 C-10: Deluxe-optioned cab, shortbed, fleetside Pontiac 462 ci, Kauffman D-Port alum. heads 4L80E, narrowed sheetmetal Ford 9-inch Tubular front and rear suspension Custom 6-piston front disc and 4-piston rear disc brakes