430 cubic inch LS6 aluminum block with ported 243 heads.
Bore is 4.135 and stroke is 4.000. Pistons are RaceTec -22 dish.
Darton sleeves, no oil consumption issues as the Darton sleeves are longer than the factory sleeves.
Callies crank 24x, 8 counterweight, Lunati rods.
Oil pan and windage tray clearanced for the longer stroke.
Melling M295HV oil pump, pick-up tube girdle.
with a D1SC Procharger. It has a custom ground Comp Cams 247 intake duration, 257 exhaust duration. .637 lift on a 115 lsa.
Made 730whp on 14lbs through a th400 with a loose converter, 9 inch rear and slicks. Compression with the ported 243 heads I have was 9.6:1 with a -22 dish RaceTec pistons.
RACETEC LS 15° EXTREAM DUTY FSR FORGED PISTON SET #1000944
Specifications
Engine Family LS 15° Extream Duty FSR
CID/Ltr 430/7.0
Bore Inch 4.135
Bore mm 105.03
Stroke Inch 4
Stoke mm 101.6
Rod Length 6.125
Comp Dist 1.115
Crown Volume -23.5cc
CR 1 10.2 @ 65cc
CR 2 9.9 @ 68cc
CR 3 9.7 @ 70cc
Alloy 2618
Pin 0.927
Oil Rails Included Yes
Top Ring 1.5mm
2nd Ring 1.5mm
Oil Ring HT 3.0mm
Piston Style Dish