No it's just a pic of a 428 block from my files that I used to illustrate to the seller where to look. The block in the pic is an early '70's 428 service block.
WSU, just curious what the casting date on your ribbed 428 block is. I have always wondered when Ford started adding the ribs on the side of the block skirt. I ASSume that it was sometime in 1972 or 73. I also have a 428 service block with the ribs, mine has a 1973 casting date. In fact, this was a 428 Cobra Jet service short block, it has a 1UB crank, C7AE-B 13/32" rod bolts, and the pistons have "428 Super" cast around the wrist pin bosses. When I pulled it apart, the rod and main bearings were 1973 dated DABs.
My drag car has a 1971 dated 427 side oiler, hyd. lifter block, and that block does NOT have any ribs on the skirts.
It's actually not a pic of one of mine it's a pic that I copied from the 'net years ago and it was one of the best pics in my files that showed the block lugs where the assembly date codes are stamped. The reason I am pretty sure it's a 428 is the original .jpeg name indicated it was a 428 service block and the upper water jacket holes in the deck look to be the taller 428 style. So if it's a 428 with external ribs it has to be a service block since 428 production for the car assembly plants ended in mid-'70 and I am certain that the ribs came later.
As far as when the DIF blocks started being cast with the external ribs I have always thought it was sometime in 1971 as I have had and seen some ribbed DIF blocks with 1971 casting dates. I don't remember the exact dates but IIRC they were all cast sometime in the last half of 1971. What is the casting date on your 71 SO block?
I have had 3 428 service blocks that were cast in early '74. I still have one of those being cleaned up at the machine shop currently (it was VERY rusty) and it has the latest casting date (4D9) that I have seen on a DIF FE block. What is interesting about these '74 428 service blocks is that they all lacked the rear bulkhead "C" scratch but they are real 428's and not bored out 391's.