Spec's on the Edlebrock 2172 cam are as follows:
Duration: (advertised) 282* intake, 292* exhaust
Duration: (@.050) 204* intake, 214* exhaust
Lift @ cam: .280 intake, .295 exhaust
Lift @ valve: .484 intake, .510 exhaust
Timing @ .050: intake open @ 5* ATDC, close @ 29* ABDC
Exhaust open @ 44* BBDC, close @ 10* BTDC
Centerlines: Lobe seps. 112*, intake ctrline 107*
I have good low end torque, no problems pulling a load on long hills, will cruise about 70-75 MPH. As for the intake, I'm happy with mine, P/N by the way is 3771. I drive my truck to and from work (80 miles) every day. Just remember to not use the one piece metal intake gasket with an aluminium intake manifold, you should use a paper gasket as the expansion rates (metal/aluminium) are differant.
3G Alt. Upgrade, Duel Batteries, 351M bored .030 over with Edlebrock cam and intake, C-6 w/AO4D internals, 3" lift w/RS 9000, 33x12.50 MTR's, Saginaw PS Pump Conversion, On Board Air, Detroit Locker, Hydro Boost Brake System, Altimeter from a CH-46D, Map Light from a MH-53E.
U. S. Government - Wasting paper and keeping Lumber Jacks gainfully employed since 1776.