Chevy 1937-1938 H-78 Twinflow Heater Core
HC 37-38 H78 Twinflow
Images of housing and support plate is for identification only. You are buying a heater core and 12 fan pusher for the 1937-1938 Harrison two door twinflow housing. The housing and support plate are separate items and not sold here.
If you are a purist, you will probably want your round Harrison heater core restored. However many of you may just want your window clear of fog, your feet warm and your wife happy. The 1937-1938 round heater cores are designed to fit the Harrison H-78 housing. Our re-designed heater core uses a better core design and a 12V SPAL fan. The thickness grows but we designed an interface that is not visible when installed inside the housing.
[Housing image is for illustration purposes only]
Our build queue varies.
Made in the USA
We make to order. Please allow adequate time for us to build.
Build time estimates [Feb 2025]
Brass/Black Model Ts
Our longstanding foundry (supplier) closed and all production was shifted to a neighboring foundry. Apparently many of the closed foundry's workers were ineligible for rehire by the new foundry due to more aggressive immigration enforcement and the union has no employees to provide. As of 2-20-25, we should receive castings in March 2025 and can resume production then.
In the interim, we have been working with our one-off foundry to have pattern boxes made and these are trickling in in smaller batches and we will produce what we can.
Model As 5-6 weeks
Heater cores ~6 weeks
Model A and 32 Ford Street rods 6 weeks
Common street rods ~12-15 weeks
Tricky customs & complicated restorations ~16 weeks months
We appreciate your patience as we continue to recruit and train new fabricators and manage the labor shortfall our country has been experiencing.
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