Your experience with the truck says the '40 will be fine, especially considering limited to no winter driving. I went back and looked, and found Jack's (Henry Rifle) post following up on his install of the Hi-Zoot B&M tranny cooler, made for all weather extremes -
http://www.clubhotrod.com/hot-rod-ta...tml#post559412
On a side note, Jack's picture of his "bug attracting yellow" coupe was my computer screen saver for months at the office, before I took the plunge and ordered my roller package for my black coupe. I miss his posts, but he sold the car and hasn't been around for a long time..... Christmas 2019.