Underseat heater cores are a manufacturing challenge due to their round shape (and their low volume). As such we are going to re-design a heater core to fit within the OEM "housing". The unit will however have a 12 V SPAL fan per the customer's request. The production year is a 1941 Buick but they were used in the mid 40s to mid 50s in Packards, Cadillacs, Lincolns, Studebakers, Buicks and Willys.
Small batches helps divide out the design/development costs so if you need one call us directly. Its going into our build queue and we'll be working on it in the middle of April 2018.
The Brassworks
805.239.2501