On 48 Kaisers, the entire engine block, head, water pump, oil pan, oil filler tube, generator mount brackets (both), harmonic balancer, clutch bell housing and transmission was painted a medium grey. The generator, starter, fan blade and oil filter bracket were all painted a semi gloss black. The gloss is more than a flat but definitely not a high gloss black (I think it's a 60% gloss). The distributor mount (the part that attaches to the head) was usually left unpainted but I've seen some originals that are the same grey as the engine. The distributor body was painted the same semi gloss black. The vacuum advance should be unpainted.
The air cleaner, oil filler cap and any brackets that hold the heater hoses should also be semi gloss black.
Hope this helps!