http://www.compcams.com/Technical/Search/CamDetails.asp?PartNumber=12-679-5

http://www.compcams.com/Technical/Search/CamDetails.asp?PartNumber=12-678-4

Looking at these 2 cams and would like to know what you guys think. It would be going in a 406SBC,9.5ish:1 comp,5.7" rods,stock 76cc heads (1.94I/1.6E)with a home port & polish plus gasket matched,750dp(4779 Holley)with a Torker intake,TH350 w/ 2200stall(flashes to 2800 with traction)and 3.73's. Right now I have a CC 280H and am lookin for some more power plus quicker rpms.I want to get some heads 70/72cc with 2.02/1.60 but will have to wait some more. Protoplines are my first choice,Sportsman II's second choice.

You're just itchin to make those new slicks stick aren't you? If you going to get the heads I would go with the bigger cam It looks very healthy should pull real hard.

I would wait on the cam and keep the money in the "heads fund" jar. You will see a much bigger jump in power by putting good heads on the engine. Stock 400 heads are some of the poorest heads you can find.

The Comp 280 you have now is a good cam. If you had a stock cam I would change my opinion, but the 280 can make gobs of power and torque with the right heads.

If you are itching to spend a couple of bucks, get a Performer RPM intake. The Torker intake is not so good, particularly down low in the RPMs.

JMHO. :D

I'm in with Greg O, keep the 280H cam and concentrate on the heads. You should be able to run high 11's with better heads, the 280H cam and a little more converter.

Both of the cams are too much for a 9.5:1 static compression motor. Your DCR would be in the mid 7s at best. Even the 280H is too much cam given the static compression ratio. Get some smaller chamber heads, go to flat tops, or both to get the compression up a bit and then get the cam to match. Ideally you should be at 8:1 DCR for iron heads and 8.5:1 DCR aluminum heads. You should be up around 10:1 (w/.040 quench) with iron heads and the 280H cam to get the most out of it. With aluminum heads you'd want to bump the static compression ratio up to around 10.5:1 to target an 8.5:1 DCR. Hope this helps.

OK, I'll wait some more.

I am looking at getting the compression up some with the 70 or 72cc heads ( about 10-10.25:1 ) and wanted to be ready for the increase. The pistons are 2498F30 TRW's which I found were 11.06:1 with a 64cc head, 9.5ish:1 with 76's. The motor makes good torque with the singleplane intake that was installed to get some more topend.
I wasn't looking to redo the whole thing over, but with all the new tech. out there, I know what I'd do next time.

DCR calculator ? lost it with new computer.

I agree with the other guys-heads first.

On another note, does anyone find Comp's reccomended springs for those cams a little strange? While those 986 springs give 130lbs on the seat, they only give 280lbs open(-.500). I would have guessed that isn't enough pressure for a solid cam with that agressive ramps and size-but what do i know.

We go to a 987 spring - about the same on the seat ( 138# ) but more over the nose ( 325# ). Comp has to be conservative with the spring rates due to break-in failures. We break in the flat-tappet cams on just the outers.