Mike,
The V.A. "sure fit" systems includes everything needed to replace a factory A.C. system, so yes the right angle hard lines are part of the kit. I have the same version in my build & the 4 lines run through the firewall with a supplied cover plate. when I did my '72 I used a "universal" kit setup & I did what you have done, I felt the same way, although I did not connect the heater hoses (I'm in the desert and it was a show truck). I would feel comfortable to run them how V.A. instructs to do it. I feel V.A. is a quality system with many satisfied customers. I am on my second system personally & very happy.
hope this helps.
