I would like to swap in the 7M-GTE, what all do i have to do or purchase in order to swap in a 7M-GTE into a car that came stock with a 7M-GE or is there a better cheaper engine swap that i can do?
There is a ton of info on here about this. Try the search feature and see what you come up with.
Where can i get a radio that will hook up to the stock wiring harness?
Check the for sale threads or post a 'want to buy (WTB)' thread. Someone on here should have one. Or check E-bay, scrapyards etc.
Where can i get a cheap radiator? The one in it is plastic and the top has started to crack and leak.
What do you mean by cheap? Used? New but not too $$$? I would suggest a new rad, either OEM or aftermarket. It will last a whole lot longer and you'll have the piece of mind that it is new. Shop around for price. Someone on here might have one also...once again make a WTB thread.
Where can i get cheap front struts?
See above
The windshield was probably replaced and leaks a few drops here and there, whats the best way to stop water from getting through?
Ummmm.....reseal the windshield? How exactly is water getting in?
Half of the body moldings rusted on the inside and were hanging off the car or where glued on with all kids of crap so i took them off, whats the best replacement? Can i just get a roll of generic body molding from the local auto parts store and throw it on there and make cutouts for the side markers?
What exactly are you trying to do here, restore the car or just put it in a state that looks somewhat ok? If I remember correctly the '89+ mouldings are all plastic and will not rust. They would be the best replacement....dealer part...$$$. Or ask around on here. You might get lucky.
Good luck with the car!!