will 17x11 wheel fit between my frame rail and body...

I have an early A dart as well that I mini tubbed. I have just under 14" inches for tires. Make sure you measure and pick the correct backspacing when choosing your wheels. There are some great instruction on weld wheels website as to how to measure so you get it right the first time. Post some pics onc eyou get your wheels.
Best of luck.
Rod