$6500 with no injection system? He doesn't even go into detail about the origins of the system, so according to that add it "could be anything". Not much of a sales pitch.
I don't see all the parts in the pics either so that would be a question. When I priced everything out way back I figured a full bolt-on kit (with ECU) would need to retail around $8500 but decided the volume would just be to low to make it worht the bother.
$6500 for the mechanical stuff used seems quite high since I know I could build a new one brand new and sell it for less than that. I'd think a fair price would be more int eh $3500-$4500 range.
The blower itself is an eaton MP90. There should be 3, 5, 7, 9, psi blower pulleys and a drive pulley, the pulley in the pic is the 9 (pushing 10) psi one.
Then there should be modified cooling rails and water pump back housing....I think....I'm getting old , I can't remember if I did that on this setup, I think I did, but it was 13-14 years ago. I had to do at least the back housing to move the T'stat out of the way of the blower drive.
The injectors are 30lb/hr high impedance.
It made 301 rwhp on my car before tuning ended with a failed injector and it was still a bit lean so I'd guess the final number would be around 310-315rwhp.
I made it for a QV but it should also fit 328 or even 348 with minor changes. As I said the blower is an MP90 but that could be swapped for an MP112 pretty easily and I'm pretty sure upgrading it to one of the newer screw type blowers wouldn't be difficult.