New cast aluminum thermostat  housing with new 4-bolt top plate, new gaskets and new cap.
 
4-bolt fitment as shown (late 67-70 R16 only) and Powder coated  plate too!
 
This kit uses a readily available (any parts store) miniature radiator cap rather than the more expensive oem style cap.
 
An excellent, economical replacement.  All brand new!
 
Fot those who want only to use a factory filler cap, new plates for those are also in process!