big block id number question

[fredico]

bought a stock 1972 chevy c30 cheyenne super longhorn outside of sacramento california. got home to va. yesterday w/replacing only the starter motor and radiator. a few spots w/minor surface rust but no rot through anywhere. i was told that the engine (402 ci, option number L47), trans (turbo hydra-matic, option number M49), and rear end numbers matched. haven't been under it yet to read the cast numbers (97 degrees today,too hot). the engine id number is TI16TKX. can anyone identify the engine by this number OR a web site to reference? thanks.