From what I can remember, the 428 cj engine was actually a comglomerate of parts basically already available by Ford. The 390 GT fairlanes and mustangs were losing to GM and Mopar's at the drag strips and with street racing, so TASCA ford assembled a 428 engine together taking I think a 428 PI block, GT 390 hydraulic cam, low riser 427 heads, etc., and put it in a mustang, which was featured in Hot Rod. The reader response was so great, and when Ford got wind of it, they decided to come out with this package called the cobra jet. So, I think the 428 cj block is actually a 428 PI block, a heavy duty block. I think I have an article somewhere about this.
Christ's book doesn't go in to this detail, but I think his book is excellent in identifying parts. You don't want to pay a premium price of a cj block when it is a standard 428 block. His book helps you not to be taken. His book doesn't have everything in it. About 1 year ago, I looked at a 427 side oiler, that the guy said he bought from Holman-Moody back in the late sixties for stock car racing. I almost bought the engine for $5000, but he wouldn't pull the heads for me to confirm the standard bore, or the shape of the cylinders, so I didn't buy it. The heads on that engine were not listed in Christ's book, but since then, I think found out that they were truly 427 heads.
I have heard of factory anomalies, 428 cj engines with standard 428 blocks, etc.
The 428 scj was not offered until 1969.
Thanks for the complement Ron, but there are alot of guys who know alot more than me about these engines.
This web site is excellent for FE engines, info. There are guys on this site that eat, sleep, and $hit FE stuff, that can tell you anything you want to know.
http://www.network54.com/Forum/21142