This is what I was told by the person, but he really didn't know for sure. I went to Summit's and Comp's website but couldn't narrow it down. If someone knows the advertised duration @.500 lift and lobe seperation, i would be most appreciative.
Below is all I was told:

Comp Cams Nitrous HP cam, .480" lift, 280 duration

The 280 is advertised at .006" lift."

Did you go to Comp Cams website and look it up?

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[This message has been edited by Aaron91RS (edited March 14, 2001).]

I could be wrong, but I believe this is what you've got. It's their "Magnum" street cam. Not a particularly good nitrous cam unless it has the 292 or 304 exhaust lobe, in which case it might work OK.

COMPETITION CAMS CAMSHAFT SPECIFICATION SHEET

PART # 12-212-2
GRIND NUMBER: CS 280H-10
ENGINE: CHEV SML BLK 265-400
INTAKE EXHAUST
VALVE ADJUSTMENT HYD HYD
GROSS VALVE LIFT .480 .480
.006 TAPPET LIFT 280 280
VALVE TIMING OPEN CLOSE
AT .006 INT 34 BTDC 66 ABDC
EXH 74 BBDC 26 ATDC
THESE SPECS ARE FOR CAM INSTALLED
AT 106 INTAKE CENTER LINE
INTAKE EXHAUST
DURATION AT .050 230 230
LOBE LIFT .3200 .3200
LOBE SEPARATION 110
THIS CAM SHOULD USE SPRING # 981-16

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Hey I finally found it
http://www.compcams.com/catalog/064_065.html
Second one down in the blue. Not particulary as much lift as I'd like. Probably be nice and streetable though in the 383, and I don't feel like taking it out and swapping. What about lobe seperation, is higher more steetable.

Ooops, sorry, I didnt read.

Higher lobe sep makes your engine more docile at low rpms. Keeps your vacuum strength up, reduces the lopiness somewhat. That same higher lobe sep is also what makes a cam better for Nitrous applications, because with the juice you don't require as much valve overlap induced scavenging to get oxygen into the cylinders.

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