Thanks all for the comments and advice already!
Since I filmed the vid, have done much more internet sleuthing, deduced the extra engine crossbar is for the side-shift conversion, and already planning to have the calipers rebuilt by PMB.
Placed a few orders with 914Rubber for interior and bushings and etcs, planning to have the motor and side-shift trans rebuilt by pros, especially as unsure what all is going on in there and absolutely zero records from previous owner.
@Charles Freeborn - excellent to learn about European Motorworks, will contact them immediately. My priority is getting the mechanicals sorted balancing between budget and performance as much as possible. Then move on to cosmetics and correctness over time. For the engine rebuild, had been previously debating Brothers VW Machine Shop in Ontario or BajaWorx in Yucca Valley. For transaxle was planning to drive it down to California Motorsports in Havasu. Trying to keep it as local as possible, but do you know where Dr. Evil might be located?
@mark04usa - great to know about the shift linkage cover and horn, have ordered new shocks all around, plus mounts, bushings, etc for the rear to get that done before the drivetrain returns.
@Jonathan Livesay - already tugged out one of the axles in the vid. That was entirely unexpected, though, you shoulda seen my face! But good advice for the stubs, will get on that ASAP, thank you.
@coondog - no, but I'm close to Hesperia and there's someone on Craigslist selling lots of 914 parts there, perhaps this is Vince? In the plans to get in touch.
@bbrock - don't like the sound of that, uh oh!
@all - the warm welcome helps a lot and please keep the advice coming. I'm an absolute amateur and this will no doubt take much longer and cost much more than expected, so anything and everything that can save me headaches is greatly appreciated.