Great rig bj74, 13bt, not a sports car, but good constant power & reliability, fun to drive, and has bells andd whistles included as factory, if right one found.
I would search 13bt, bj74 in the forum read as much as you can and understand where the areas of concern you should be aware of , main areas are rust around windscreen, rusting in arches and rockers, understand and identify colour of smoke being blown as well , less klms the better of course, more you maintain and play with it, which you will as we all of rip things apart to see how it works and then maintain it as required. These are relatively easy to work on, if you can read a FSM, follow instruction, have right tools, and ask for guidance from forum as required,....... plenty of guys have either done or doing same project as yourself, so plenty of resource here to get you going.
"When you buy a bj74 you actually get a whole lot more""