Swapping from 170 to 225

If both are as You state, '66's, nope. Other than the front pipe needing checked for clearance or modded/replaced, the rest is the same. the 225 is pretty much 1.5" taller in the vertical than that 170. I'd take that 170 off Your hands if I could get it on a magic carpet to SW PA, lol!!!
I have a 170 here 30 miles east of NYC I might part with. It came out of a 65 Valiant with 99 thousand miles on the odometer that I parted out.