LT1 LONG-BLOCK SPECS
Block:383ci LT1 fitted with four-bolt mains
Oiling:Melling high-volume pump, new factory 5-quart pan
Crank:Eagle cast steel, internally balanced
Rods:Scat 4340 forged, 6 inches long
Pistons:SRP forged, full-floating, 11.5:1 compression
Rings:Speed Pro Plasma-Moly
Heads:
383/480: GM aluminum LT1, 54cc chamber, five-angle valve job, Stage 2 porting, 190cc intake runners, ARP bolts, Manley stainless steel valves, 2.00/1.56-inch, back-cut
383/440:Same as above with 180cc intake runners
LT1 POWER CURVES
383/440383/480
Horsepower440 @ 6,000 rpm480 @ 6,300 rpm
Torque460 @ 4,100 rpm460 @ 4,500 rpm
SOURCE
Golen Engine Service
17 Dracut Rd.
Hudson
NH  03051