Tire size questions

This is not technically an a-body question, but figured I could get good info here anyway. In addition to my ‘68 notchback, I have a 1987 D150, 2WD, 318, 2.9 gears with stock wheels and tires - 235/75/15 Wrangler TA (photos attached). I would like to run chrome Steelies with baby moons for the summer and want to get more of a street rod look but am worried about messing up ride and performance. I won’t be towing or hauling heavy loads. This is my daily driver When I am not driving the Cuda. I am thinking 245 (or 255)/60/15 BFG Radial TAs or Cooper Cobra Radial Gts. Any ideas on if these will fit ok and if so how they will affect speedo, performance, rpm at highway speed, etc? Also, any issue with running passenger rated tires on Light truck (remember, I won’t be doing heavy towing or hauling)?101036A0-0BD3-4068-9D19-8757A7D15D5A.jpeg 480A1A84-5108-4894-BC6C-016AE5396B63.jpeg