Join Date: Jun 2011
Location: Colorado Springs
Boss 302 head casting numbers are:
1969 - C9ZE-6090-A or C
1970 - D0ZE-6090-A or B
Which figures. It doesn't make much sense to put actual Boss 302 cylinder heads on a regular 302 block. Any set of 351 Cleveland 4V heads will be nearly identical. You need only add screw-in rocker studs and pushrod guides. (OK, the intake valves on the '69 Boss 302 heads were slightly larger. But that's still not a reason.)
Actual Boss 302 heads are very valuable to someone restoring a Boss 302. For anyone else, it's a waste of concours casting numbers.