An-3 or 4, maybe 6 IDK outside thread sizes, Carlos. Most brake line stuff is AN-3(the 3 means 3/16 ID tubing size). AN-8 ID is 1/2" or 8/16" for example on oil lines. Do a little research on sizing.
Sounds good on your bleeding approach. I remember turning my slave so the bleeder is straight up for bleeding.
I ran a metric 10mm fine thread coupler, and longer hard line and bending the line to the firewall. Then it runs down the right lower frame rail, then the engine mount member. I looped it between the bellhousing and the frame, and put slit fuel hose over it every six inches or so and a tie-rap. Then a short teflon/braided line up to the slave, conveniently away from the exhaust heat. Completely out of the way for engine removal as well.