Rear drum brake cylinder interchangeability

A lot of dune buggies use larger diameter (capacity) wheel cylinders on their rear drum brakes --- for same issues we have on Speedsters i.e. low front end weight and rear weight bias. Assume you have front disc brakes --- so this would make for stronger rear braking.  

http://www.thesamba.com/vw/for...wtopic.php?p=5917805

Sorry if I wasn't clear, Wolf . I just want to replace what I have but there seems to be some conflict to what the pictures show and what part numbers refer to my year of vehicle.

The Madness clearly dictates that you fix what isn't broke and you improve what is broke. The SAMBA link seems to indicate that they are all interchangeable.  The link to RockAuto has the cylinders for $5 (up to $20).  The increased bore can give added rear clamping - a good thing for such little $.. 

Dave, If the bolt holes line up, and the piston slots fit the shoes, I can't see why you would be at risk here.  A little larger piston would give a little more force for the same pedal pressure, and to me, that is to the good.  Maybe others here will have deeper insight about how careful one needs to be balancing pedal pressure to braking force, etc.  Within reason, more seems better to me.  In the limit, you would not want the rear locking up while the front is just getting into the game.  I don't think this is what you are looking at here.  If some other "expert" has the right answer as different, I'm waiting to hear.

Bump: Dave, did you get this sorted out yet??