`69 1/2 440-6pk question

I was reading somewhere recently that the early 440-6 cars from `69.5 had the smaller 440 rods as most all 440`s and that the large rods were only introduced in late `69 or`70. This article was in a reputable publication, I think it was Mopar Muscle. Has anybody got the 411 on this?
Author: admin