Chevy & GMC Vans

This is in a 305 with vortec heads
intake @ cam 2947 @valve 442
exhaust @ cam @valve 465

272 advertised duration intake
282 advertised duration exhaust

Great bottom end torque producing cam.

My cam specs going in a SBC 383:
Part Number: CCA-08-301-8
Cam Style: Hydraulic roller tappet
Basic Operating RPM Range: 2,000-6,000
Intake Duration at 050 inch Lift: 224
Exhaust Duration at 050 inch Lift: 236
Duration at 050 inch Lift: 224 int./236 exh.
Advertised Intake Duration: 276
Advertised Exhaust Duration: 288
Advertised Duration: 276 int./288 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.502 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.520 in.
Valve Lift with Factory Rocker Arm Ratio: 0.502 int./0.520 exh. lift
Lobe Separation (degrees): 113
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Computer Controlled Compatible: No
Grind Number: CS NR276HR-113

COMP Cams Nitrous HP camshafts are designed to work with your nitrous system to get more power from your engine. Their unique intake lobes allow your engine cylinders to fill better, for more complete combustion. Meanwhile, their exhaust lobes are spread to decrease overlap and ensure maximum scavenging of your combustion chamber. The bottom line is an increased power boost from your nitrous system, without any loss of throttle response or torque in street applications.

Motor will have a small 177 roots style blower.

The cam I am planning for is:

GM#14097395

288/308 duration@.050 lift

196/206 max lift 1.5.1 rocker ratio

109 centerline

431/451 intake/exhaust

Called the "383" cam.