I am in the process of building a new engine for my 87 Chevy 4x4 truck.
It has a one ton suspension with 4:10 gears.

I have a spare 350 4 bolt main block that is bored 40 over. with a fully balanced rotating assy. with hypereutectic flat top pistons. steel I beam rods.

I also have a set of trick flow 23 degree aluminum heads 62cc 2.02 int (195cc) and 1.60 exh (75cc) That i was planning on using.

I was looking at two different cam slections

Voodoo cam 60101Lk that has a .454/ .468 lift, 256/ 262 Duration,(1,000-5,500 RPM)

or Voodoo cam 60102LK that has a 468/ .489 Lift, 262/ 268 Duration (1,400-5,700 RPM)

the truck will be used mostly for towing.

Any help would be greatly appreciated. Also if anyone has used either of these cams let me know how you liked them.
                             Thanks  

Since you're looking for first-hand experience I will say that I've never personally used any of the Voodoo line of cams that you seem to like, I've always been a Comp Cams guy...

I have heard horror stories of the Voodoo cams being very hard on valvetrain and it does seem very evident because they look to be very fast ramps (on paper). I suggest that you look at the recommend valve springs of the Voodoo series and some other comparable camshafts from other companies and see if the Voodoo cams require significantly more spring pressure because if they do, I wouldn't use them. There is no reason to tax the valvetrain of a tow-rig where durability will be of major concern. Hopefully since there won't be any desire for high rpm power you can discard the fact that the recommend springs by Lunati may not be up to the task of keeping up with the Voodoo ramps if you decide to use them.  

I conducted a check with the two different cams and got the following numbers for comparison.

Voodoo cam 60101LK &60102LK recommends Valve Springs, Single, 1.266 in. Outside Diameter, 462 lbs./in

Comp Cams Xtreme Energy   Lift .462/.480, Duration 262/270, Valve Springs, Single, 1.254 in. Outside Diameter, 417 lbs./in  

Sound's like somebody needs a Comp High Energy 260H,TrickFlows have good exhaust cfm this single pattern has more spread between adv. and .050 duration which means less area under the curve,like stated less open spring pressure longer life.Lunati seems to have the fastest ramp,about 2-3 degrees more under the curve to keep the valve open a little longer.They have asymmetrical lobes which has resurfaced again,they claim slower closing ramps for less stress on valvetrain.The above post says it all.  WIEDER  

I don't think these aggressive lobes on flat tappet cams can get any faster opening ramps and to keep  the lifter from digging into the ramp.Almost roller lobes for flat tappets.Last post was to compare 2-3 degrees more than the Comp Xtreme line look at the difference between adv. versus .050 duration on VooDoo and Xtreme less degrees on the VooDoo cams. Remember some people reading these posts don't know as much as some, it might be commonknowledge to somepoeple ,but not others.  WIEDER  

I'd stay away from both of those cams. Those spring rates are pretty high for flat tappet street cams. A good street cam should run about 115 on the seat, about 350 open, give or take 20 pounds.

Do this right the first time, go with a good hydraulic roller came, wide lobe seperation that has an RPM band of idle or 1000 RPM to 5000 RPM. You want this thing to make the most vacuum possible if you're gonna be towing a lot, and as much bottom end torque as possible.  

Comp Cam 260H is 308 open and 92 seat, installed height 1.700 if I read it right.Somebody correct me if wrong.       Thanx WIEDER  

okay the voodoo cam 30101LK has a duration of 213 int/219 exh at .050 of lift. Instead of the adv 256/262.  

With these new numbers does this cam still make it too aggressive for my application?

If so I was looking at another cam with a 441 int and 454 exh. with a duration of 211 int and 221 exh at .050 lift.  

It's the design not just the amount of duration or lift it has which does play a role in open pressure,it's the faster opening ramp.For a reliable flat tappet like stated earlier it's the open pressure that's needed on the agressive lobes.Your last pick is less agressive it should have lower open pressure.With your heads you really don't need that much duration split,maybe if you had stock exhaust.I still recommend a single pattern which helps build more cylinder pressure for stronger torque.Lunati #06105lk is a single 210 duration close to the CompCam at single 212 duration.These are good torque cams in a 350.Keep us posted.   WIEDER  

Thanks for all the info. I am going to with the Lunati 06105LK or the comp cam 260H.  

Okay I just ordered the comp cam 260H for my application.
Thanks for all the help on selecting a good cam for my application.  

Glad we can help and goodluck.   WIEDER  

I have a camshaft out of a 400 chevrolet small block that is new and recently installed by the previous owner. The number on the end of the camshaft is 965562, if anyone knows the manufacturer would you let me know Thanks Mitch