1989 360 SBM

why wouldn't you get the Magnum far better than the LA even with the roller cam with the option to use several of the LA stuff on it. I lived in era of the 70's and 80's car companies trying to take existing products to meet certain demands which never was any good. The 89 is old school with a roller cam the Magnum was a new design motor. Even in stock form once you have a Magnum you'll never go back IMO