Are you planning to run some sort of fuel enrichment setup or just try to tune the V-AFC for super rich after the turbo spools. With a seriously low boost (<7 psi) setup like this, I'd probably say skip the DSM's and spend the money on a good boost dependant fuel pressure regulator. At such a low boost you probably won't be overtaxing the stock injectors yet. Sending them to RC for a cleaning and flow testing would be money well spent.

I'd probably dump the Y8 head too and consider spending the money either on some better internals or a Y8 tranny (more aggressive gearing). I'd probably skip the block guard too, I've never been a big fan of them.

Honestly, I'd dump pretty much everything except the basic turbo and internals for now. Start by spending the money and building a high quality basic turbo setup and solid running block to strap it to. Work on getting the engine running strong and then start in with the bolt-on upgrades (pulley, TB, cam gear ...). You also don't mention and intercooler or BOV, two things you should definately consider. Seeya.