Thanks for your quick reply had a hard time finding this thread (new to this site) I was able to source new rear cylinders from local old school parts house called “Mars” which still has the original sign from opening in 1948 !!! The cylinders are Dorman part number W81803 Sup and W 81802 Sup upper and lower not sure which is which sorry !! So now I’m off to the fronts which are both leaking after rebuild. I’m gunna give them one more shot at honing unless someone has a source for replacement cylinders ?? Thanks again for your replies and knowledge

Btw I sent my hydrovac out for rebuild to REI just waiting for them to send it back. While I wait for that I’m going to replace all steel lines with the nickel/copper type. The short ones inside the drums had a leak and figured might as well replace them all like “78buckshot” did !! Peace of mind will go a long way !!!

Thanks again to all