Came across hotrodreference.com, as the name suggests it does indeed contain a lot of useful reference information organised into useful classifications.

Technical Reference by System:

Body/ChassisBrakesDrivetrainElectricalEngineFuel System: Carburetor Manuals, Diagrams and Part NumbersGeneral InformationSuspension

Technical Reference by Style:

Hot Rod – Nostalgic/Traditional/EtcSpeed Equipment – Current or fairly “Modern” speed equipmentVintage Speed Equipment

Take a look here