347 Dyno # w/carb nat aspirated...setup for supercharger

As I am fortunate enough to have a Stuska Powertest ENGINE Dyno at my disposal at my father's shop, I ran the engine in on the dyno just to see where we stood, sans the injection and charger. This is a 347 with the following pieces thrown into the mix.

Stock block - Canton girdle and windage tray
Canton 7 qt pan
PBM rotating assembly (short 5.325 rod,16cc dish Mahle Piston,cast crank-28 oz)
Edelbrock perf 5.0 heads...lotta work on the exhaust,minor on intake side
Steeda 19 cam 220/226 @.050 115 LSA... small blower cam
PBM valvetrain...145lb seat/310 open, AMERICAN MADE stnlss valves
Weiand Stealth intake
750 holley
schoenfield dyno headers
PLEASE keep in mind that this engine is only 8.9:1 compression ratio and will be injected with a Vortech S-trim and on pump gas for the street. I.E. not a race engine

2600 RPM -400 lb/ft - 198 hp
3500 RPM -425l/ft - 283hp
4000RPM - 431lb/ft - 328 hp
4500 RPM 443 lb/ft(peak) - 371 hp
5000 RPM 427 lb/ft - 407 hp
5800 RPM 417 lb/ft - 426 hp(peak)
These digits are respectable for PRE-BLOWER #'s. this is expected to bring 460-480 at the tires and be FUN to drive.
Thanks....William

Are you worried about splitting the block?

Yes....and no. The Charger is just a Vortech S trim. It made 12 lbs on the 302, maybe 8lbs max on this combo. it will have a gentle street tune for a daily driver and willl not be leaned on all that hard. The torque gain down low with this combo should make the car MUCH more driver friendly. We'll see - I guess.
Honestly with that lazy cam I was only expecting about 380 - 400 peak hp, but I guess unshrouding and minor portwork helped a little too much(sic).