I cannot recall seeing any caps with the numbers cast on them like that. I do know that all the ones I see here have gone through a couple iterations.
Earliest were like the ones you show with round cross bolt extension legs going out to the pan rail. I might have a few loose ones like that sitting at the shop. Ones from at least the last four years have had a squared off cross bolt extension. I had two of the earliest blocks and still regularly use one of them in Engine Masters. They both had cast caps, without cast numbers and without the pull hole and neither broke at the 700HP+ level after a pretty fair number of pulls/runs. I have seen the later steel and cast caps with an arched pan facing underside and a flat square looking one. No idea why the difference.
