Lmao!, you are close! pretty sure its a 71/71 LeMans with its front chrome bumper missing, just going by the grill sizes and the spot in between them, and it isnt a '70 Lemans, cause their bumper wraps around the grills.
Yeah it's my very first car, a 72 Lemans, that's my baby. Used to be done up as a 455 powered gto clone but in the process of restoring original. (Inbetween my other Pontiac projects and the truck)