The facts about the Mopar Eicke heads and block are, A: the heads were redesigned Pontiac 45427 cyl. head castings, the changes involved, valve relocation, valve stem centerline angle, head bolt pattern, port changes, logo and part # change,. The heads were deemed illegal at Mopars request to the NHRA and replaced by the Hemi castings due to Mopars continued embarassment by a non factory supported (Allen Johnson) team, remember the "No Mopar" slash accross a circle that A.J had on his car ?
B:The block was a Dart industries part that was redesigned by changing the crank thrust from the rear GM location to the middle Hemi location, it also had a hemi main journal size and a Mopar/GM bellhousing bolt pattern.
The illegal blocks (GM DRCE2) refered to were in the Nickens and Mogan cars, the NHRA was waiting for them at the Richmond race and sent them home. A.J. (with legal block) was allowed to race and became the first Mopar to join the 200 mph club.