99-04 GT 4.6 Turbo build possible or will she break

How far can I go with a SOHC 4.6 how much boost can I run while keeping it under 91 octane. From what I know smaller engines need more Boost PSI to make more power vs bigger engines. What kind of whp would it make with pump gas only and would it be reliable. What parts of the original engine could be used. I think it would need to be Built Rods, Low Compression Pistons, ARP Headstuds, Cams, Rockers, Valve Springs, Valve's. Too many parts what do you suggest.

99-04 GT 4.6L V8 16v SOHC 1 cam per cylinder head
4601cc 281ci 90 Degree Modular Cast iron block
260hp @ 5250rpm 302tq @ 4000rpm Redline 5750rpm
Chain Timing Sequential Port Fuel Injection
Bore & stroke (in/mm) 90.20 x 90.00
Compression ratio 9.0:1

03-04 SVT Cobras Super Charged Intercooled 4.6L V8 32v DOHC 2 cams per cylinder head
4601cc 281ci 90 Degree Modular Cast iron block
390hp @ 6000rpm 390tq @ 3500rpm Redline 6500rpm
90 Degree Modular Cast iron block
Chain Timing Ford EEC-V with port fuel injection
Bore & stroke (in/mm) 3.55 x 3.54, 90.2 x 90.0
Compression ratio 8.5:1

6-speed manual
3.55:1, limited slip
Independent rear suspension
3665-3738 lbs Coupe