The short three row radiator uses the same end tanks off the early radiators and just has a 3 row core. Heres the suggestion I got at www.mazspeed.com

Take the end tanks off the old style radiator fronm a junker, bring it to your local radiator shop with your tall 2 row radiator. Tell them you want a 3 row core, using the end tanks off the older one but make it the same height as the tall 2 row and with the same mounting brackets.

YAY! I'm gonna try it when I get the cash.

 

Thats what im going to do to my radiator once i bridge port my engine and a heavy duty clutch.