Jacks: 69 cuda fastback

Well i have been hard at work and yesterday i 'went to town' on cleaning the engine up, its ready for paint as of today. Today i will also be cleaning the transmission up so it will look better. then next is the kframe along with the whole engine bay which i will be painting/sandblasting. any sugestions on how to get the heater box out along with the heater core? here are some pics for you guys, and there is my dad power washing the engine :toothy7: also where can i get transmission lines?
Also i got my fender patch done for the drivers side, now i need to get some filler on it and start with the sanding again