360DartGT66 said

Hey @krazykuda, You made a post here (in 2015 ...) about factory cam specs for the 273. Pictures from the Manual. It has the cam data, which is perfect.

One question, though. For the 2 bbl cam, it says "duration 240 degrees". At which lift?

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toolmanmike said

I hope Karl has those specs so I can update my info.

Here is some information I gathered for my build. Of course reading toolmanmike and other resources

273 Commando – (rated at 235 Horsepower)
CAM Valve lift: Intake .425 and Exhaust .425
CAM Duration: Intake 248 and Exhaust 248

273 Standard – (rated at 180 Horsepower)
CAM Valve lift: Intake .395 and exhaust .395
CAM Duration Intake 240 and exhaust 240

Comp Cam 20-246-4 (what I used)
Valve lift intake .468 and exhaust .468
Duration intake 270 and exhaust 270

Here is Comp recommended for my build
Comp Cam 20-222-3
Valve lift intake .462 and exhaust .470
Duration intake 262 and exhaust 270

Isky E4 cam
Valve lift intake .425 and exhaust .425
Duration intake 260 and exhaust 250

And how can we talk 273 without a reference to the D-Dart

D-Dart
Cam Valve lift intake intake .495 exhaust .505
CAM Duration: Intake 284 and Exhaust 284

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