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