I heard that Saturn 1 cam engines develop porosity in the aluminum block beyond 100k miles. Twin cam version does not have the same issue. Porosity is not the same as "soft" in my mind, but maybe that's what he was suggesting. Or straight bluffing.

Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph