68 Yenko Camaro Engine Accessories Date Codes

[Mr70]

Your Alternator,Ex. Manifolds & Distributor etc. should be dated before your Tonawanda engine pad date,since that engine pad date denotes when the engine became a self sufficient running engine,so it needed those parts to make it run.Remember,they were installed when the engine was made at Tonawanda,NOT at the cars overall production date,(Trim Tag).
But your Carburetor should be dated later on,just before your vehicles Trim Tag date,since it was put on the engine after the Alt./Dist. were,and they used Liquid Propane and a Run Box to start the engine@ Tonawanda w/o a carburetor for safety reasons @ that exact moment.