I think all of these "Atlas" motors, fours, fives and sixes have the same long 4"(+) stroke lenghts. In the stock automatic pick ups and trailblazers these motors have factory shift points of 6200 RPM. They really have very strong (but Aluminum) bottom ends with at least 4 bolt(or more) main caps. Kevin Self's Bantam goes 10,000 rpms-thats alot of scrap iron flailin' around!
In the stock applications the lack of cubes at bottom end is not noticed because of their long stroke and computerized F.I. Wish I didn't already have a 292.
Bottom ends are not so much of a prob on most of today's inline sixes due to them having the same bearing sizes and two more than their V8 buddies.
