Sorry, you bought a 2+2...
That being said, the shop manual can be found at https://www.xenonzcar.com/s130.html
The engines in these are stout and can take some abuse. The fragile bits IMO are the fuel system. Just start slow, inspect everything, and take pictures. People liked to hack up wiring and cobble things together cause they didn't understand it or they couldn't afford the parts.
Another thing to check before you start dropping money into it is the floorboards and frame rails.
Take that windshield out and save the metal under it. I can guarantee you it's rotted out and letting water under you dash into the wiring and such. Pay someone to take it out properly, the trim is fragile too dont start yanking on it.
Good luck, current state of my 18 year project attached...