74 with front drum brakes - confusing options

mtldart said
I am fairly certain my master cylinder is shot.
no leaks anywhere in my system and my brakes are questionable at best. sometimes pumping them will get them to stop the car, other times I'm just floating down the road hoping there's nothing too close. i've bled and flushed the whole system as well just in case.
Here's my dilemma. I can't seem to find any site that lists the 74 as having all four drum brakes. I know that's what I have. My master cylinder also has the two pots the same size.
I'm comfortable rebuilding the master, but cant quite figure out the parts situation and my local parts stores are no help at all.

here are my very confusing options.
can anyone shed some light on whats going on here?

REBUILD KITS.
rockauto has nothing for a 74 available.
for a 73 they've got a Raybestos MK659 "manual brakes; 9" brakes" for 23.24cad

MASTER CYLINDERS
rockauto has these listed as option for 74
Raybestos MC36439 "manual brakes" 80.44cad
Centric 13063018 "front drum" 89.83cad

then has these listed for 73
Raybestos MC36338 Element3 "manual brakes w/ 9" brakes" 52.65cad
Centric 13063015 "9" brakes front drum brakes" 69.85cad

I was under the impression it would have been the same parts for 73 or 74 for drum brakes all around, so why the different parts and part numbers? so will that 73 rebuild kit work? will the 73 master cylinders work? thats a significant price difference and different part numbers for reasons I just dont understand!

anybody have any input on this?

OK you are on the right track here with your research.

For the Drum Drum A Bodies I like to use the Raybestos MC36338 "manual brakes" as it has the 15/16" bore for a little easier pedal.

Compared to the other 1" and 1 1/6" larger bores like the rockauto has these listed as option for
1974 Raybestos MC36439 "manual brakes"

Can order the Raybestos MC36338 "manual brakes" 15/16" bore master for Drum Drum:
DODGE > 1973 > DART > 5.6L 340cid V8 > Brake & Wheel Hub > Master Cylinder

The Raybestos MC36338 "manual brakes" 15/16" bore Drum Drum works nice on the Drum Drum B Bodies too to soften up the hard pedal, gives you more leverage and just a tad longer stroke. Works Great . . The Proof is in the Pudding.

Yes can be confusing, but have been through this.

Was perfect for a better brake feel on the Drum Drum Cars. 15/16" bore master.