Shane, the 272 was used in the p/u as well as the 300 series cars in 57 and still used the 3 bolt carb and matching Holley designed Lodomatic distributor.
Starting in 57, all 292/312 USA production used a 4 bolt Holley as well as the new distributor.
The following is something I posted elsewhere, it might help.
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Follow this link to all you ever need to know about the Holley 2110
http://www.angelfire.com/d20/holley/ Ignore the crap this site adds, copy just from the www
I'll try and end some confusion and misinformation on this series of carbs.
- The carb initially came out in mid 1938, designed by Chandler Grove for Ford to replace the inefficient and leak prone Strombergs. Chandler got screwed by Ford when they gave Holley the contract for '39 production. The C-G is very rare.
- The "94" was for the venturi size .094".
- Several different castings and bowl ID's over the years, here is a basic rundown:
- With no rear venturi vacuum port; used 1938-48 on Ford, Merc and Zephyr. Castings 99, 89, 59A, etc Nominal 155 cfm.
- With rear vacuum port and no base mounted spark arrestor; used on all 8BA style flatheads except Merc 1948-54 depending on vehicle and country. Still .094 venturi. Common castings are 8BA, 8RT, EAB. Nominal cfm 162.
- With rear vacuum port AND base plate mounted spark arrestor; used on Y Blocks 1954-57.
EBU, EBV were on all 1954-55 239 as well as 256 in trucks only. Have a 1" venturi and nominal 170 cfm. Usually have a 1 on rear of bowl.
ECG, the # following means nothing for internals. Used on all 272, 292 1955-56 and '57 272. All have 1 1/16" venturi and flow 185 cfm. Have 1 1/16 on rear of bowl. Some have automatic chokes, those for auto trannies have a dashpot.
All the above are FORD designations, not Holley. Holley referred to them as the 2100 and 2110 and auto store replacements for Fords will have Holley # on the bowl. There are also Bendix replacements that are Holley style but have a 97 on the side; these are often sold on EPay as true Strombergs to the unwary.
In addition there is a 2130 with 1 1/8" venturi that was used as a strictly aftermarket for performance. Very popular on VW Beetles.
As you can see the cfm ratings differ quite a lot over the life of that series which is commonly referred to as the 94.
It is for that reason that they not be selected helter skelter for multi carb setups.
Another problem that is common is the mismatching of parts during rebuild cycles; there are subtle differences that can cause problems.
The aftermarket Holley models were available well into the late '70's.
Ive been using the 94 since the late 50's from stock to all out racing. A very nice but often misunderstood carb. Too much pure crap has been printed in the past and is still believed and repeated today.
Possibly some differences in Canadian production.
