A 1970 boat would not have a 12 digit HIN. That started in '72. Some where on the boat there may be a manufacturers model code and hull serial number but it's not the same as a HIN.
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
2018 Robalo R180 CC, Yamaha 115
Bitter Gun Owner