Can you fit a 9.5 wide rim-and associated tire- in a 74 delta? 17 inch 9.5 wide.

 

Without knowing the tire size and the wheel offset, it is impossible to answer this question.

 

9.5 inch rear wheel no problem. Torque thrust II 5 or 5.5 inch backspace-they only make 1 in a 17 inch wheel. 275 55 17 tire. Fits real nice. With the new ford 9 inch rear it's going to be fun next year at the strip.