[GuyBFF]

The only negative aspect of the cooler core is they chose to use a solder core.

I worked in an auto parts store for a long time and there are two types of heater cores. Ones that are soldered on the outer edges and tank edges only (if you look between fins you will see the copper color starts 1/8" in), and those where they totally submerge the core in solder. The submerged are totally coated in lead, so they don't transfer heat nearly as well and customers always complained about poor heating in winter if they bought the cheaper one.

I can't say for sure if you require the cooling the Big Momma gives, but I can assure you it is a better core (from selling hundreds of these types of cores).