Can I use a Autolight 4100 to replace a Motorcraft 4300 carb..... - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-21-2006, 10:15 PM
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Can I use a Autolight 4100 to replace a Motorcraft 4300 carb.....

A question for some Ford experts, can I replace the Motorcraft 4300 four barrel carb on my 77 Ford 460 with a Autolight 4100 four barrel carb. Both carbs are rated at 600 cfm. The 460 is out of a 77 Lincoln Mark V and will reside in my 78 F250 four speed manual trans Camper Special pickup. I have heard the Motorcraft 4300 is a fire trap waiting to happen, plus it is in need of a rebuild. I also have a Autolight 4100 four barrel carb for manual trans car or truck, but it too needs rebuilt. Will the Autolight 4100 work on my 460 or will it not?????

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Old 07-21-2006, 11:28 PM
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Well...

If the engine is from a LINC, the carb is a 4350 spreadbore. The 4100 carb will work but not on the present EGR spacer. You will need a TRANS-DAPT PN 2199 adaptor or try to find a pre-EGR intake (pre-1973) with a squarebore carb pad (you might even find a used EDELBROCK cheap).

BTW- The 4350 is junk. It and the earlier 4300A and 4300D were designed by ROCHESTER for FORD.
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