I went right to Roush and had a forged short block and the TVS blower installed. Stronger clutch and bigger sway bar. Dyno'd about 510 hp, very safe with the stock tune.
2015 Stage 3 Roush
'66' Ranchero w/almost done 302 T-5 swap
2000 4x4 Ranger
2003 4x2 Ranger
'69' Fairlane Cobra, 428 4-speed waiting for work