Though the 305E may have been the most common in 67, there are not that many around today. As usual many haved been Chivied with that ubiquitous small block V8. In 67 for the first time there was a large mix of Chevrolet engines in GMC Trucks such as the 230,250 & 292 inline sixes and 283,327 & 396 V8's along with GMC's 305E and 351E V6 engines. I would consider 1967-69 V6 powered pickup as rare today, it was the last of the breed of real GMC pickups.