1940-48 Ford; 48-52 F1; 53-56 F100, some Merc and Lincoln have all been used on Model A's with the stock axle...
Use '40-'48 backing plates (actually the '39 backing plates work but the drums have the large bolt patern) and this adapter https://www.clingsaftermarket.com/addtocart.asp?prod=39&subcat=4 It is available from most early Ford parts suppliers. Charlie Stephens
The adaptor kits for 39-48 Ford hydraulics(early 39-41, late 42-48) to 28-36 spindles consist of bearing spacers and centering rings for the backing plates. The bolt pattern of the early spindles is smaller than that of the 37-41 or 42-48 spindles so the backing plate mounting holes must be slotted to allow the smaller pattern to work with them. You can use either 39 only hub/drum ***emblies if you want the "wide-five" wheel bolt pattern or the 40-41(outside drum mount) or 42-48 (inside drum mount) hub/drum ***emblies. All front wheel bearings are the same 28-48 P***enger Car and 28-47 Pickup. The 37-41 spindles are so hot because there are jillions of them and they make the conversion simply a matter of changing the spindle/brake ***emblies and using the kingpin corrsponding to the spindles in any 28-48 axle.
So if I were to use A spindles what mods would need to be done to use 37-41 backing plates and 42-48 backing plates? Both would need a spacer and elongated holes?
OK. If you want to use your Model A spindles and either 39-41 or 42-48 backing plates with either 39, 40-41 or 42-48 hub/drum ***emblies, you buy the hydraulic brake adapter kit from your local Model A or Early V8 Parts supplier. Yes, both would need the spacers and elongated holes. to mount them to your Model A spindles.
Adapters ****> Dave Wilton of TM sells a Bendix style brake that uses the small Model A style pattern on the plate and you get some real brakes instead of the sorry early Ford/Lockheed style that costs more than they are worth. The Wilton brake uses Ford 12" drums. You can best use the Bendix on the front and the Ford on the back using Dennis Cling modified backing plates which solve the lack of clearance at the spring perch that palgues the use of the A rear. Good Luck: Fred A
any 1940-1948 ford. i would suggest the enfamous 1948-1952 ford f1 tho...alot of good feedback on em.. try to get the entire truck for parts and stripe it down for parts. the steering box and wheels and hydraulic brakes can all be used with your model a. goodluck