I may have messed up here.....

Thanks Moper,
That’s cleared up my misunderstanding. I was just concerned that the motor would be a bit flat (Relatively speaking...!). Luckily, my Crane 689521 cam is apparently a good choice for my application according to my engine builder, with more appropriate pistons. If he agrees, then those -24 SRP would be my first choice, seem like a better (cheaper....) bet than a custom set he was pushing me towards!