I'm building a '71 340 'cuda that will mainly be stock except I want to upgrade the cam a bit. The engine will have KB 9.5:1 pistons, stock J heads, iron intake w/ TQ carb, and stock exhaust. 4 speed with 3.91 axle from the factory. I want a fairly smooth idle and good vacuum so nothing too extreme. The cams I'm considering are:

1. Mopar Purpleshaft P4452761AE 268-272 Duration .450"/.455" Lift
2. Comp Cam Xtreme XE256H 256-258 Duration .447"/.455" Lift
3. Comp Cam Xtreme XE262H 262-270 Duration .462"/.470" Lift
4. Lunati Voodoo 60401LK 256-262 Duration 454"/.475" Lift

Anyone have experience with any of these cams, and if so would you recommend for what I'm building? Any other cam recommedations?

Thanks

I'm going to build a similar 360. I purchased the MP cam you listed. Engine isn't together yet, so I can't give you my own experience with it, but it was recommended to me.

The specs on the Lunati look good, too.

The Lunati Voodoo's are nice cams. I would look at the 60402 as well. It will get you 17 plus inches of vacuum with a nice idle and a very strong, smooth power band.

Troy Bray put a comp XE268 in his Challenger T/A. Stock exhaust and ran the power brakes fine. I've riden in it and it was strong. Idled very nice. Started nice, totally tame street manners.

Go bigger , you won't regret it . Comp or voodoo 268 , I,ve ran both on mild builds .

Bob Karakachian (mrsixpack) offers the repro of the original 68-4spd, special grind, 340 cam. If you email him and tell him your specs, he'll help you 100%.

The Bob K cam is terrific, get it if you can. I have used every mopar HYd cam offered except the small ones ones and the Bob K cam works better on the street then all of them. Smooth idle and power all the way threw 6K. Too expensive the comp 268 works very well also