Advice on potential gear swap

oh, btw i hadn't caught that you're running a 28" tall tire. with a 2.94~3.23 gear that maths out to 75~85mph speed at 3K

newer converters are built for this type of driving, but i still would keep it in mind in that heat is the enemy of transmissions and all that. and operating something right in the window of "on and off" isn't always the greatest for longevity.