Not trying to pic apart the car or the mechanic, but this is what I see:
I don't know what this connection is for. But crimping on a spade connector and shoving it in an open half of a factory connector is shody work. Could be for something non critical, or critical. Don't know. Doesn't matter. That's the type of wiring "style" I'd expect to find everywhere.
MSD timing retard control isn't waterproof and is supposed to be mounted inside the vehicle.
Left to right:
More random wiring not in a loom. Non factory. Will be difficult to figure out what's what when you have issues. All wiring looks haphazard in general IMO.
Ground is in empty sway bar bracket mounting hole. There is no front sway bar from what I can tell.
Heater core bypassed . It's got no heat. Those only get bypassed if the core is bad. It's a labor intensive job to replace. Not a fan of just bypassing things instead of fixing them. I'd expect that "style" throughout the car.
Homemade subframe connectors. Not a problem in and of itself if they were made well, which they aren't. Those aren't doing much at all. The rear portion should extend as far back as possible and be stitch welded the length of the sibframe contact points. Those don't even go to the thicker portion fo the factory subframe.
Front of subframe connectors is the same. Not enough contact. They need to extend all the way to the front of the factory subframe. Those are only a few inches long. Very little weld area. I'd expect they will just crack off after a while.
When you buy an old car you're also buying the mechanics work. Personally I think it looks amateur. It's not a run away from situation. But the price needs to match the work. You'll have a decent amount of money to get it straightened out. Personally I'd re do all the wiring especially the ignition and MSD boxes.
The subframe connectors should be removed and replaced. Those aren't helping anything IMO. If anything they are going to rip out at the tiny weld areas and tear the factory sub frame.
This is just my opinion but when I see work like this it just makes me wonder if they did the engine work in a similar fashion. Generally people are consistent in their work. If most of it looks amateur, chances are all of it is.
Looks oily under neath. I'd look at where the Vortec oil return line gets tapped into the oil pan and snap a few pics. If that's leaking you"ll probably need a new pan.