Will 15" rims with 3.5 backspacing fit my 69 Baracuda?

I am looking for some advice from fellow members on whether 15" rims with 3.5" backspacing and 60 series tires will fit my 69 Barracuda. Unfortunately the car is striped down to the shell with no suspension so I cannot mock up the dimensions and measure the clearances. The specs for the wheel and tire combo I have available are as follows

Front 15x6 3.5 inch backspace 215-60-15 tires
Rear 15x8 3.5 inch backspace 245-60-15 tires

This is a stock suspension car, stock disc brakes with power steering. In the rear is an 8 3/4 with stock leaf springs and stock leaf spring hangers.

Most mag wheels I have seen spoken of here on this site have had greater backspacing.

Thanks for your input before I commit to the purchase.