Need Experienced Turbo Users Help

[TurboLark]

heres what i was thinking... Pls give me opinions on my selection and pls let me know if you know of a better product or company.

Holley Street Avenger 870CFM
Edelbrock Performer RPM
400 Bored .040
114cc 455 Heads Ported And Polished
Forged Internals
Comp Cams Cam(Not Sure Specs: But I think its supposed to be low dur high lift?)
Garrett GT40 Turbo Compressor Housing 88mm 54 Trim, .72A/R | Turbine Housing 73 Trim, .94 A/R Pushing 10PSI
3" Turbo Piping
27.5 x 12 x 3 Spearco FMIC
Tial 40mm Wastegate
3" Pypes Header Back X Pipe Exhaust

Carb is too big. Just find an old 750 double pumper.
Cam should be low to negative overlap. I have a cam for my turbo 383 that has 236 and 242 duration with only a few degrees of overlap. For your hp goals you can go smaller than mine(I'm going for 1000hp). Get the cam with lift to complement the port work.
That turbo is too small. supports 650hp, which means it does a max of about 650hp. you will be needing alot more than 10lbs of boost to make your 600hp. Again, find a good used t76 and you will make 600hp easy, and have room to grow as you need to.
You only need 2.5" tubing from the headers to the turbo,then a single 3-3.5" off of it. Use 3" from the turbo to intercooler, and 3" from IC to the carb bonnet.
40mm wastegate is minimum, the 46mm would be better.
Use 3.55 gears or higher(3.00-3.25 would work well also).