I'm wondering if anyone knows what size the threads are on the fittings for the ABC hoses. I cross-threaded the hose going into the rear valve block after I rebuilt a few nights ago and I am wondering if I can use a tap on the hole.

I will update this as nobody responded. I bought a used valve block without the valves and installed my valves with new o-rings. Instead of attaching the assembled valve block to the body and re-attaching the hoses, I attached the difficult hoses first, then the rest of the hoses, and lastly attached the assembled valve block to the body of the car. None of the threads mention how difficult it is to re-attach the hydraulic hoses, especially if you are trying to do it on the ground.

Pro-tip....

A hoist is money well spent for giving your car attention.

Difficult to seemingly impossible chores on your back become in many cases almost reasonable tasks.

$3000 has one installed.

Do it.