What transmission coolers are you swappers using?

[derotoreut]

I'm currently doing a 5.3L, LM7, 4L60E swap into my '70 K10. My radiator does NOT have auto trans cooling provisions. I'm trying to figure out what transmission cooler would be good to use as a primary cooler. I understand the importance of keeping the transmission fluid cool (200 deg or below).

The truck will NOT be a daily driver or used for towing. It will be driven only during the summer months as a fair weather truck only. It's getting Vintage Air and has radiator/condenser combo.

I contacted the people at Derale to ask them for help in sizing the right cooler. They told me that since I don’t have an auto trans cooler in my radiator that sizing of a primary cooler is important. They suggested that I get their PN 13960 for use as a primary cooler. It comes with 6 AN connections, 500 CFM fan and 180 degree in-line thermostat for turning on the fan. They said that this cooler can be mounted anywhere, and in any position. If I bought it I was thinking of installing it either under the bed, or horizontally up front just passed the core support. A good friend of mine said this is overkill and I don't need one with a fan. He says I should simplify and install a plate/fin or stacked plate style upfront in the core support area, just not in front of my radiator & condenser. Any thoughts? Thanks.

Here is info on the Derale cooler that was suggested:
https://derale.com/product-footer/fl...9/13960-detail