Yes, it really is not related to a BBC engine. The DRCE or whatever they call it is an iteration of Warren Johnson's prostock engine program started during his Oldsmobile days. Since these engines are all basically the same block architecture now, really not much difference to the eye. I talked with a gent a few years back, who designed heads for Prostock engines, he said he was contracted to do a wedge type and a hemisphere style design head. Ford for Jim Cunningham put up money for the design of both heads. The Chrysler guys decided on the hemisphere and Larry Morgan picked the wedge type head. I believe Jim Cunningham wanted the option to try both. Of course, as per NHRA the aerodynamic rules were not cast in stone , so Ford went with a body that NHRA would accept. Morgan felt that the NHRA was being anal, and had a body modified to what "he" felt was needed. That car tested, and was quite competitive, especially in the mph category, but NHRA ultimately did not approve it. After that, as we know Jim Cunningham passed away (cancer) and Ford Racing decided nobody was watching NHRA anyways, so pulled support from John Force, and thanked Larry Morgan, and John .