Just bought a convertible 68 the guy I bought it from said its not the original engine but the replacement 396 big block Got weird numbers off the pad T6151719 Also got engine block numbers which are as clear as day but only 6 numbers and it starts with an 836 dont remeberr the rest Im at work. Someone told me it could be a crate motor.

You can contact www.chevymania.com (http://www.chevymania.com) and email them your numbers and they will tell you what's up with your car.