Front End (frame) replacement questions

Supposedly, Mopar put the same T-bars on /6 w/ A/C as they did on the 318 w/o A/C. It's fairly easy to tell, even without the part number from the bar. Clean off a section of the t-bars you have and measure the circumference of the bar. If you want to compare the measure you obtain with most charts that use diameter, divide your measurement by 3.14159.(d=C/π)

If there is a difference in the circumference in the two pair that you have, I'd use the larger of the two.