transmission coolers
 

I have a sport modified . I am running a 2 speed powerglide. Where is a good place to run the trans cooler?

It doesn't matter where you mount it. Its a room issue. Mines mounted up by the front wheel on the chassis rail. Just make sure your trans is full after running up the engine. If you can get air flow through it, do so. Mine only gets air from around the wheel well because of the clip design but it seems to work.