what is the stock engine color for a 72

[BCOWANWHEELS]

i just got a 1972 cheyene and the engine had been rebuilt about 14,000 miles ago ( 383 stroker ). i want the truck to appear as stock as possible. the p/o painted the engine black. is this stock or is chevy orange stock ? he installed a hi-volume ,hi-pressure oil pump in the engine and i am going to pull the engine to install a deep sump (7 qt ) oil pan then would be a great time to paint the engine, install the oi pan & pickup , also do the vette ram horn manifold swap, mini starter swap along with the edelbrock 2101 intake swap along with edelbrock valve covers ( old school ). please tell me its orange to be correct.
bob in tn.