just grab a set of stock lines from anything with a 727 or 904 trans and use them, if you need to cut patch them together to get plumbed, then use brass 5/16" comp fittings on the steel lines.

the trans rubber line is more $ but will last longer. but that is way to much rubber hose under there, to much to go wrong and not enuff chaffing resistance with rubber.

you can buy long straight flare nut piece from the auto parts and cut the flare ends off, use comp coupling to piece it together bending as you go.

use a fan pully or tube bend, something round to help bend tight turns in the steeel line with out kinking.

the ridged brand tubing bender is great for bending up steel tubing.

rubber hose...dont do it.