Yes, you have the fresh new good stuff.

I just mentioned it due to:
1. Additional parts you might want (driveshaft core, accessories, harness connectors, TPPS, etc.)
2. Having an engine/trans to fit without worrying about damaging the fresh stuff.

I assembled a 340 once starting with just a block, crank and rods. It ended up costing more in time and money than if I had just started with a complete motor. That's why I tend to look for stuff like I posted, even if I end up with more stuff laying around. And my yard proves it!
The project sounds great and should be quite a handful when complete.