Three bolt cam-sorry, some of my comments may not be entirely correct. Was just trying to help, alerting him to some things in the progress of his build, things to think about. Feel free to educate me anytime.
As far as I know, in Chrysler big blocks, only the 426 Hemi's and the 1970-'71 6-BBL engines came with the 3-bolt cams. The '70-'71 6-BBL engines used the same cam sprocket (2780572) as the 426 Hemi.
