Brakes: dual master cylinder

[wuga]

1962 Lark wagon. Does anyone have a part number for a dual M/C, either 4 bolt or 2 bolt mount with a 3.5" mount spacing? Anywhere I look, they only list a single pot for my car and nobody lists the mounting specs. I have converted to front disk brakes and want o run a dual M/C.
Thanks
Warren

[JoeHall]

Pretty sure you can use a 64-66 Studebaker MC, but of course will need to re-plumb the 1962 lines, and maybe custom make a piston pin. Avoid the 63 MC, as it used an outlet line fitting size that is hard to find. I converted a 63 over to 64-66 style, many hears ago, and it was fairly east IIRC.

[thunderations]

Pretty sure you can use a 64-66 Studebaker MC, but of course will need to re-plumb the 1962 lines, and maybe custom make a piston pin. Avoid the 63 MC, as it used an outlet line fitting size that is hard to find. I converted a 63 over to 64-66 style, many hears ago, and it was fairly east IIRC.

64-66 Studebaker dual master cylinders are for DRUM brakes only. The disc brake cars kept using the single masters.
Look on Studebaker Parts.com web site and they have a help section. On there is the procedure for replacing single cyl masters with duals, including which master cyl to use.
I updated my 66 Daytona disc brake car to a dual master using their guidelines.
As I remember it used a Mopar master.

[JoeHall]

64-66 Studebaker dual master cylinders are for DRUM brakes only. The disc brake cars kept using the single masters.
Look on Studebaker Parts.com web site and they have a help section. On there is the procedure for replacing single cyl masters with duals, including which master cyl to use.
I updated my 66 Daytona disc brake car to a dual master using their guidelines.
As I remember it used a Mopar master.

OK, so what is the problem with using a 64-66 tandem MC on the OP's 62 wagon? Disc brakes did not come out till 63, so for sure his has front & rear drums. I also contend the same MC could be used even if the 62 was converted to Turner DBs, as long as the fronts' RPV is removed.

[thunderations]

OK, so what is the problem with using a 64-66 tandem MC on the OP's 62 wagon? Disc brakes did not come out till 63, so for sure his has front & rear drums. I also contend the same MC could be used even if the 62 was converted to Turner DBs, as long as the fronts' RPV is removed.

The problem is that in his post he says he converted to front disc brakes. The stock Studebaker dual master does not have the proper size reservoirs and orifices for front discs. Later master cylinders from other manufacturers are compatible with the Studebaker rear drums and stock or converted front discs. Aftermarket dual masters are also less expensive than original Studebaker and no need to add or remove parts. No need to reinvent the wheel, so to speak.

[JoeHall]

The problem is that in his post he says he converted to front disc brakes. The stock Studebaker dual master does not have the proper size reservoirs and orifices for front discs. Later master cylinders from other manufacturers are compatible with the Studebaker rear drums and stock or converted front discs. Aftermarket dual masters are also less expensive than original Studebaker and no need to add or remove parts. No need to reinvent the wheel, so to speak.

Was not aware OEM drum MC reservoirs and offices were incompatible with DBs. Agree, modern drum brake, tandem MCs work OK with front discs, including Turner's DB kit. No problem with reservoir or office sizes, but do need to remove the 10 pound front line RPV from the MC, and install an inline 2 pounder. Turner provides those instructions for his tandem MC mount kit, when using front discs. For frame mounted tandem MC, he suggests Raybestus #36237 (for drummed 1970s AMC and Jeep). I have been using 36237 for decades, with two different front disc systems (11" and 12"), and it may be a good candidate for the OP. Here's a couple of pix: