I say go with the GM cam ground for Vortecs. I put a link in your other posts. Look at this article from GM. I am thinking the crate engine has dished pistons also so your most you may end up with 9:1 as with the crate engine. http://www.sallee-chevrolet.com/fram...ds/Vortec.html
24502476 Hydraulic Flat Tappet (300 HP 350 HO Camshaft)
This hydraulic flat tappet is used on the 350-300 and 330 HP special performance engine P/N 12355345, and 12486014. The duration at lash point in degrees (intake/exhaust) is 320/324; duration at .050” tappet lift (intake/exhaust) is 212/222 and maximum lift with 1.5:1 rocker ratio (intake/exhaust) is 435/460. Valve lash is zero/zero and lobe centerline is 112.5 degrees.
GM says it will do what your looking for and it's specificly ground by GM for the vortec heads. Call the parts department ask for a crate engine take out they sell them for around $40.00 (salle Cev is Now Gilbert Chev, I just saw this)
From GM about the engine and how it sounds:
Add to the strong foundation a pair of 64cc Vortec cast iron cylinder heads and a dual pattern camshaft with just a bit of a “lumpy” idle, and you've got the muscle car small block that you've been looking for.
The cylinder heads on this great little performer use 1.94” intake and 1.50” exhaust valves that are sprung with 1999 L31 valve springs. The 64cc chambers yield a healthy, but streetable 9.1 to 1 compression ratio.
The cam is a modern dual pattern interpretation of the old 1965 to 1967 Corvette 327 cam. But with more lift and duration on the exhaust side, it does a better job of clearing exhaust from the combustion chamber. We also decreased duration and lift ever so slightly on the intake side to build more cylinder pressure. The result is a cam that makes great torque and horsepower with the 350 HO’s 9.1 to 1 compression ratio.
I think the general has put it all togehter. It might not have the numbers your looking for at 400HP but I do think it has everything else you want and does have great torque. Any artical I have ever read in the magazines find it very hard to improve on this cam. It also has a torque curve that is very steady and I think will work very well with your overdrive trans and will be friendly at the pump also. I have this set up in my 327 but have not run it yet. I have seen the crate engine run at the drags and heard one though and it sounds just awsome. From what you desribe your looking for basicly the same thing I was. I hope I found it, from what I have seen and heard I think I did.