I know you guys talk about the factory cams. My question is this, what are the durations and lifts of the 67 68 grind cams. I am looking at what cam and springs I need to get the sound and performance I want. Thx Joe

Have "GM's spec's" at home.
Post'm Monday if no one else does by then.

Just because you have all the specs on paper don't think you'll be able to tell what the performance and sound will be like. If the cam doesn't match well with the rest of the parts it won't perform it's best and the sound has alot to do with your exhaust system and a little bit to do with the cam.
I think best you could do is post your specs and maybe have everybody you know post theirs and a sound clip so you can hear it first person. Get some good ext speakers hooked up to your comp.
I'll start: http://www.youtube.com/watch?v=gas0I47WerM
400 with Erson single pattern cam:230/230dur. .510 lift(w/1.65) 110LSA
Longbranch mans/2.5in pipes w/x-pipe/UltaFlow Welded and dumps

I am putting a 68 400 motor together. I have 68-#16 heads that I am in the process of setting up. The car has a richmond 4spd and posi carrier not sure of gear ratio. Reason I ask about the cam specs is I don't know what the factory grinds were. I know some have mentioned using such cams but I want something with a noticable lope. I want to compare the lift and duration of factory and aftermarket to pick the best cam for my application.

You can have my Crane "Fireball" cam if you want lope.
[video:youtube]http://www.youtube.com/user/Canada1Baby?feature=mhum#p/a/u/2/B8Dc7_tmsio[/video]

Ran her before I torn down the engine and car.

Wallace Racing site has about the best list of cam specs both aftermarket and stock(on different pages).
http://www.wallaceracing.com/cam-specs.htm (aftermarket page)

I don't think you'll find a factory grind with a noticible lope unless you go with a RA solid grind. Most of the factory cams were ground for the consumer and therefore made to be fairly mild and comfortable to drive for the general public. You'll have to go out of the box to find one with that hot rod sound.

067 intake.

opens 23*
closes 70*
duration 273*
lift .410

067 exhaust

opens 78*
closes 31*
duration 289*
lift .413

valve overlap 54*

068 intake

opens 31*
closes 77*
duration 288*
lift .414

068 exhuast

opens 90*
closes 32*
duration 302*
lift .413

vlv ovrlap 63*

Thx Mike, exactly what I was looking for. I was thinking about something close to the 68 grind but slightly more aggressive. I am going to talk to my machine shop about lowering the compression to make my engine a little pump gas friendly.

Not to go off post but what machine shop are you using?

The Summit 2801 is the high lift version on the 068. Similar durations, but much more valve lift and a tighter lobe separation. Would provide more lope than the 068, but still very street friendly in a 400.

I have run this cam in my 400. Good solid running cam. Not much by way of lope.

I have the Summit 2801 in my yellow 'bird. It's an auto, and it's a very easy to drive cam. The exhaust, which is a replica of factory, gives a very throaty idle and nice cruise sound.

We put an Isky cam with similar specs to the 2801/2802 in the '68 400, with a Gardner exhaust, and it sounds a bit lopier, and even more throaty with the long branch manifolds. It growls.