Often referred to as bullet proof, the Chrysler slant 6 engine has developed quite a loyal following. In production from 1960 to 1991, it powered many different vehicles, including this 1963 Valiant.  A recent Slant Six Gathering in San Francisco brought together more than 50 Chrysler vehicles powered by the straight 6 engine with the 30 degree slant. The rules of the occasion: no judges, no trophies, no tickets, no rules. I like it! Find the Slant Six Gathering here. More info on the venerable slant six can be found at Allpar.