sir18g

I am looking to get my car tuned for the turbo setup, I have a b16a with eagle rods/arp bolts, srp 9:1 pistons, str blockguard, stock head gasket, arp head studs, gsr cams, aem gears, 310cc RC injectors, V-afc, the turbo kit is the greddy one for a 99-00 si, I have an fmu 12:1 also. This is in a 90 civic si with a obd0 engine and ecu. I was thinking of finding a chip for the ecu and using the vafc to fine tune it all. I was told by the shop to go with 450 dsm injectors an aem fuel rail/regulator and a 255 fuel pump and I could run 300+ whp safely. If anyone could help please give me advice or let me know if I am going in the right direction. Thanks