Ditto!
Running my truck to Winchester a little while back, my “think I can 216” on the Pa. Turnpike was a little over confident. We made it to Winchester, but,……….on a flat bed trailer

I replaced that engine with a 235cu in. Now I can confidently run 65 mph with a 410 rear. I do have a T5 to install, hopefully soon. That will also assist in lower highway RPM’s.