My girlfriends aunt has a 64-66 she wants to get rid of, I haven't gone to look at her yet but I don't wanna pay more than 2k and I'm trying to haggle her down to 1k

what I already know:
coupe
needs tires and a carb(I also suspect brakes)
she does run
apparently the floor pans have holes.

obviously I have the 91 ranger that's my daily, so i have time to restore(somewhat) and for now i plan to place sheet metal over the holes and weld it down then once I'm out of school I'll replace the entire floor so I got that part covered.

what else should I be looking for when I go to look at it

I've wanted a mustang since I was 5 and I finally found a candidate.

 

well depends how perfect you want it to be....theres usual spots for rust, floor pans, base of doors, cracks behind rear window, panels behind tires in the wheel wells....use common sence, were would water settle.....

 

Also check the cowl vent in front of the windshield. If you can pour water in it and it does not end up in the floors inside you're in good shape. To repair the cowl on the earlier mustangs (64 1/2 -66) takes a lot of work to cut it out and replace. More money if you are paying someone to do it.

 

what should I look for after I crank it up?

the lady's son said there's something to do with the gas lines wrong so is there something that usually fails in gas lines that I'm missing?

it was driven to where it is currently parked under a pine tree 2 years ago so tree sap(which isn't a biggie cause i plan to sand it down and prime it for now) past that I'm worried about brakes and sediments in the fuel.

 

if you are planning on driving it or leaving it outside, do not do this. most primers are porous–you will end up creating way more work for yourself in the long run. you will need to strip the primer off again before you paint the car. the only real exception to this is 2k epoxy primers, but you still don't want to paint a car after the primer has sat out in the elements. you will run into adhesion and rust problems.

as for the fuel lines, the gas tank tends to collect rust and sediment that finds its way into the fuel lines, filter, and carb (especially in the main jet and needle valve). most people just replace the tank and flush the lines. tanks are cheap and it's far easier than trying to clean up an old tank.