What is the new HP rating of SBC 1965 327/275 10.5:1 Compression ratio?

with dual exhaust headers, edelbrock performer alum intake, 600 edelbrock performer carb, 151 cam, C236 matching 461 2.02 1.60 fueli heads? I was told it is 350- 365 HP now. What do you think? Trying to reach 400.