This is actually for my 65 Skylark so bear with me. I have a set of Trans Am WS6/GNX wheels, 16x7 front and 16x8 rear. I'm putting a 245/50/16 on the rear (it fits). I'd like a 60 series tire on the front. What size tire would give me the same height as the rear tire? Thanks.

 

A 205-60-16 is 25.69" in diameter give or take your 245-50-16 is 25.65. This is a good calculator for comparisons:
https://www.discounttire.com/learn/tire-size-calculator

 

Wow, that's precise! Thank you.