Farmall Carb Venturi Numbers

LarryM

Member
I have a question on the Carburetor Farmall used on the M thru 450, Super H thru 350 and on all the six cylinder gas engines in the 560 thru 56 series. My understanding is that all the venturi will interchnage and the difference is the diameter of the hole. My M and 450 have a 27 in them. I bought a junk M and parted it out and it had a 33 in it. I think a 706 has a 29 in it. Is there a chart some where with this info? How many CID do you need to make a 33 work well in an M?
 

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