68 master cylinder advice

[fatboy.88]

Hi all, I'm new here so I guess this has been a subject for discussion before.
My charger came with a Wilwood front disc brake conversion when I purchased it.The master cylinder I believe to be the original Bendix 11323 model with double hump and spring cap. It also has the factory power booster. The brakes work okay but could they be better? Now the MC is leaking fluid from the top rubber seal and is looking a bit tired I've taken a closer look at the braking system. I'm wondering if the master cylinder should have been upgraded when the disc's were first fitted. If so can anyone give me a part number for a MC that would be a direct fit to the booster. I live in the UK and as yet have been unable to find a supplier for a new rubber gasket if the old Bendix MC is fine to use. Any ideas where I could get this part in the states?
Thanks in advance for any help.

[Dino]

That master cylinder is the stock drum master, you need a disc master although you could remove the residual pressure valve from the front line but you'd have to check the fluid levels a lot as the disc master has a larger reservoir for the front brakes.  The seal is available on ebay usually.  I do not know the part number for the disc master but I'm sure someone else will chime in. 

Welcome to the board!   

[fatboy.88]

That master cylinder is the stock drum master, you need a disc master although you could remove the residual pressure valve from the front line but you'd have to check the fluid levels a lot as the disc master has a larger reservoir for the front brakes.  The seal is available on ebay usually.  I do not know the part number for the disc master but I'm sure someone else will chime in. 

Welcome to the board!   

Thanks Dino I shall look up the part number and replace the MC.