Naughty boy Appearantly, was the '56 Chevy patrol car with a dual-quad 265 police package(?) not enuff of a distraction
Unfortunately, the latter had to wait a year and get a notch higher compression, to get those 315 horses. The '61s even topped 1 HP for every cubic inch: https://www.enginefacts.com/chevrolet348/ The superiority of this engine design over that of the Small Block explained:
Actually, according to the experts over at 348-409.com the 315 HP 348 came out in Late '58: -"Late in 58, another version was released, this time being the 315hp 348."- http://www.348-409.com/general.html