Steve's is an early model, and as such does not have the cast in oilway that runs up from the PRV to the cam trough that came in 1952/53. It will also not have an oileal on the crank drive side. This is an easy way to tell the types apart in poorly described ebay listings or on the hoof at a jumble. Good picture, not often seen for comparison.
Lucky fella, working with nice clean internals that look to have had some TLC. Camshaft key is a swine, sometimes displaces as the gear is pushed on, making a nice gouge in the face of the cam bush. Cam will have a little bit of endfloat at this stage of assembly, the breather cork chosen (or flatted down) needs to be thick enough to be compressed slightly with the cover on, but not so thick that the breather sleeve is under a great load against the timing cover. Yup, guilty as charged, inexperience of youth. Needs to be a good airtight seal between breather and cam gear for the system to work properly, so thickness of the cork is important.
All assembled, you should have a cam that turns easily, with no endloat.
Swarfy.