Just do an LS6..

Block Type:
Cast aluminum with 6-bolt, cross-bolted main caps
Bore x stroke (in):
3.90 x 3.62 (99 x 92 mm)
Camshaft duration (@.050 in):
204 degree intake / 211 degree exhaust
Camshaft lift (in):
.525 intake / .525 exhaust
Camshaft Part Number:
12565308
Camshaft type:
Hydraulic roller
Compression ratio:
10.5:1
Connecting Rod Part Number:
12577583
Connecting rods Type:
Powered metal steel
Crankshaft Part Number:
12583565
Crankshaft Type:
Nodular iron
Cylinder head Part Number:
12564825
Cylinder head Type:
Aluminum, symmetrical port
Displacement (cu in):
346 (5.7L)
Engine Name:
LS6 5.7L:
Engine type:
LS Series small-block V-8
Maximum rpm:
6500
Piston Part Number:
88984245
Pistons Type:
Hypereutectic aluminum
Recommended fuel:
92 octane
Reluctor wheel:
24X
Rocker arm ratio
1.7:1
Rocker arms Type:
Investment cast, roller trunnion
Valve size (in):
2.00 intake / 1.55 exhaust
weight: 457.6lbs