Rear tire fitment

Is the rear particularly high in the air?

I have 215 70R14 and I have about 1/2 inch to the spring (maybe 3/4) and some clearance to the lip. But I don't see how with my stock rear springs I could add another 1.5" (40mm) (3/4" on each side) to the tire width on my 67 dart.

If the rear is high you might want to load up the car with yourself and 3 of your larger friends and see where it sits.