Maybe it's belt and suspenders, but I'm running the tranny fluid through the radiator and then through a tranny cooler. There have been many posts on this subject and lots of different opinions. In the end, I followed the recommendation of the tranny builder, a large volume manufacturer. I'll watch the temperature through the 4 seasons and then make adjustments if necessary. Then I'll know for sure. I can always cap off the tranny cooler and use just the radiator or vice versa.
For a '65, the center grille mount prevents a large cooler from being used. A small style fits vertical off to the right side. I made some brackets that span the vertical dimension of the AC condensor, which has a row of existing mounting holes. I used a 7500 BTU stacked plate cooler measuring 11"x4.5"x1.5".
On mounting the Alumitech radiator, with the dual fan arrangement I couldn't use the stock radiator shroud. Not enough clearance to the belt pulleys. Instead I mounted it directly to the core support. All four mounting holes on the radiator lined up with a small amount of reaming. I suppose I could have narrowed the stock shroud, but it didn't seem necessary and I'm keeping all the stock parts for the future.
Any comments on the above?