I checked out your video, lovely looking motor!
You mentioned not having anything else to do prior to getting your kit...and I thought to share some of my experience that I did mention some in my posts. If you are trying to get the build done more quickly than slowly, you could contemplate the following:
Wheels and tires - I only needed to build for a couple weeks before I was ready to put mine on.
Coolant reservoir/coolant pipe filler neck/coolant hoses
Engine oil cooler?
Alternative interior details, such as doing something fancy with the dash
Bolts! Motor mounts, trans mount, rear axle t-bolts for the brake backing plates, Bellhousing/trans bolts, starter bolts
Pulleys and belt and accessories (I'm about to install a CVF Serpentine kit, Alternator only)
Fuel pump
Cooling mat stuff
Driveshaft safety hoop
Pre-read the manual
Let me know if you want to discuss stuff in private.