Don't you remember when (the 80's) there was a shift away from high compression to the stroker with lower compression so you didn't have to run 100 plus octane fuel in street/strip cars? The fuel became hard to find?
Pretty much why the 340 got replaced by the 360. Low compression, smog engine with enough stroke/torque to do a really good job moving C-body, or go to work in a D200