I have an Old Air system in my 54 truck.....installation and fit were great. The big difference I've noted between the Vintage and Old Air units is that the Old Air hose connect fittings are accessible from the engine compartment while the Vintage air connections are inside the cab.....under the dash. Old Air is much easier to install/service but the exposed fittings detract from a "clean" look firewall.
The Old Air 3 speed fan is very powerful on "Hi" to get things cooled down quickly and the "low" setting is very quiet....more like an OEM system.
Dave
