Holley's SysteMax II for top end?

[vettegofast]

hello everyone, i am glad to be here! I have a 1984 Chevy Corvette which i will be building into a stout street pounder. I am not interested in using NOS or Forced induction. I have a 350cid motor which will be getting rebuilt. Anyone ever use Holley Systemax II for a 350? They claim 425/425 on HP and TQ. How is the street manners? Gas milage? Low end grunt? I do realize i will have to get a 2500 stall for my 700R4 and 3.73 gears. Thanks to all!

[vettegofast]

Ok heres the specs.

Vital Statistics
Engine production years: 1968-86
Horsepower: 425 @ 6150 RPM
Torque: 425 ft./lbs. @ 4250 RPM

Kit Contents
Lunati hydraulic camshaft and lifters, P/N 07104LK
Holley dual plane aluminum intake manifold, P/N 300-36
Double roller timing chain and gears
Fully assembled Holley aluminum cylinder heads, P/N 300-552-1
Hardened push rods, P/N 301-37
ARP® cylinder head bolts, P/N 301-35
Assembly lube


Camshaft Specifications
Intake valve gross lift/duration: .490"/290°
Exhaust valve gross lift/duration: .490"/297°
Intake valve duration @ .050": 235°
Exhaust valve duration @ .050": 240°
Rocker arm ratio: 1.5
Intake valve lobe centerline: 107°
Lobe separation: 112°