CLIM - CLIMTZRV  62-64 Hawk Heater Valve Type T H1241 Everhot
CLIM - CLIMTZRV - heater control valve interchange.  1993-95 Geo #74850. 
(Avanti@psu.edu) Mar 2001
CLIM - CLIMTZRV- Heater Control Valve -  Everhot  H1241 / Ranco   7493488
CLIM - CLIMTZRV  - NAPA 660-1254 (maybe 660-1245) Same valve fits 
Allis-Chalmers, 1971 - 1982 J. I. Case, 1971 - 1972 Massey Fergurson, 
1971 - 1982 Winnebago Motor Homes, 1971 - 1982 Heater Control valve  
(Climatizer) Seal Kit Ranco  HTR-100. (Mar 2000) NAPA 660-1000 - (Mar 2000)
CLIM - CLIMTZRVS - Heater control valve seal  '63 - '84  Balkamp #660-1000
CLIM - SEAL - CLIMTZRVS -Climatizer SEAL REPLACEMENT get NAPA part no. 
660-1000 [Replacement Seal].  cost around $15.  instruction sheet (Bulletin 
No. 1531219) was included in the NAPA/Balkamp package. Apr 02 
CLIM - Temporary fix - CarQuest Temperature Control Valve, part 
# 277901. ( no Thermostat action)
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July 2005
Part number 74850 / manufacturer Four Seasons, a division of Standard Motor Products and sister company to Factor Air.  It is used on the 93-97 Geo Prizm.
valve is all plastic and does not have the the automatic temp control Bulb 
Tom      rex468@comcast.net  
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HTR-CORE - HAWK - heater core for a Studebaker Hawk, (Not 62-64), part number is Everco H2245. too big for 62-63-64. looks eactly like the GT. Dimensions are 11 inches long tank to tank, 6.5 inches wide and 2.5 inches thick.