Trans cooler/Heater core

Hey folks, anybody here ever used a Transmission cooler as a heater core? I know they will hold less antifreeze, but they will also keep good pressure (not like my original fresh heater coil) without leaking. Just tring to save some money.
Thx for the help!
Mike

 

They are both heat exchangers, no reason it won't work. Great idea... thinking outside the box... heater box that is

 

Thanx Lakeroadster! Seems ok to me. all it can do is leak again