'79 EldoB Keeper?
 

I like having a nice summer ride and recently picked up a '79 Eldo Biarritz that looked to be in nice shape. Has the 350 gas engine. No visible rust, frame reasonable. Leather on seats is without cracks. I've put in a radiator. P.O. had trans rebuilt.
That's the good:

Here are the challenges/warts

Brake and fuel lines are rusty/worn
Small trans leak (dunno from where)
Engine idle runs high
No headliner
Heat and AC not functioning.

I don't want to sink a fortune into it. Do these repairs promise to be a cost nightmare? I'd love to convert the air ride to a regular coil spring. Seems like kits cover all years but '79! Your input appreciated.