Trans Coolers

I have a 727 with 2800 stall converter behind my 318 w/ 360 heads(soon to be replced with a 360).

I am planning on installing a trans cooler. I probably should have done this when I got the converter, I know, but I'm finally getting around to it. I work at AutoZone and we have the Hayden trans cooler kits there which I can get a discount on. This is a daily driver with some mild racing for fun. Will these kits perform well? How does the install go? Bypass the radiator trans cooler or install in-line WITH the radiator trans cooler?