Tranny cooler lines

I've searched around but didn't really find an answer... I need to replace the original tranny cooler lines (66 Barracuda /6, A904) - has anyone done this using pre-bents line with car fully assembled? It looks to me to be near impossible! I figure I'd need to remove the intake/exhaust manifolds in order to route the line in between the exhaust and the block - perhaps remove the rad too? If it can't be done without major disassembly then I'll go the rubber hose route for now until I get another opportunity. Thanks in advance!
I’ve used them on both my 63/64 valiant and dart. I can tell you that nothing fits like oem but they worked. I needs to rebend them as they were exact.

Jake