There are a few misconceptions about Chrysler’s big block workhorse, the RB440 that continue to this day. The first that the post-1973 RB engine blocks were cast thin, and are unsuitable for boring .030-inches (or more) over. This is factually inaccurate according to 440Source and Mopar Action, who have conducted a significant amount of sonic testing to prove this theory.

Read the whole story at Mopar Connection HERE: