I sent a fax to comp cams with this info but haven't gotten a reply yet. When I saw this cam for sale I compared it to the 294s cam I had in the motor(duration@20,lift,lsa) the motor is a 408 bb stock length rods and stroke,11-1 compression, merlin oval port heads gasket matched and bowl blended and ports cleaned up,2.250intake, 1.880 exhaust, Comp pro magnum roller rockers, weiand team G oval port, 750cfm holley,2" hooker super comps 3"exhaust, super t10 ,4.11 gears inthe rear.

The cam is a solid roller part number 11-000-9 cb280-6/284-6 r12. It's a custom grind serial# R-8380

The cam card reads: valve adj. 22I 24E. gross lift 690. duration @.020 280I 284E. valve timing @.050 Int opens 11 btdc closes 55 abdc
Exhaust opens 57 bbdc closes 13 atdc specs are for cam installed @112 intake cl dura. @ .050 Int 247 Exh 251 lobe lift .4060 lobe sep. 112
I degreed the cam in right off the cam lobes this is what I got: Int opens .006 40btdc closes 89abdc closed @ 110 degrees Exhaust opens .006 88bbdc closes 46atdc closed 66 degrees
I found the cam listed in the in the lobe spec section of the catalog and it reads: to be used with high rocker ratios 1.7 and up and efficient cylinder heads. The hi-tech roller is great for bb chevys, fords and clevelands.

I've run some dyno runs on My Mr gasket desktop Dyno first edition and came up with torque 413 @2000 rpm 557 @ 5000 rpm, horsepower 626 @ 6500 rpm @ 0 degrees advance.
Thanks for any opinions. They are appreciated

The 280 cam will work. However, if you want to run pump gas, I suggest installing it at 112º ILC. That will give you an 8.33 DCR given the 11:1 SCR you posted. With any cam advance, you'll likely need race gas. With this cam, keeping the engine cool and never letting the engine go lean is important.

Thanks Pat. I tried running the DCR but came up with numbers like high 6's and low 7's. I wasn't doing something right. I'm trying to keep the compression up there because of the late valve closing. If I remember right I got a DCR stroke of about 2.180 Any chance You could email Me Your input and the results. Thanks again
patrick5106@aol.com

I'll bet you were using 55º for the intake closing when it should be 72º (112 LSA @ 112 ICL). Try that and see what you get.

I was using the 89 degrees @ .006 lift for the intake closing point. I see how You came up with the 72. I'm going to put on 1 head and degree the cam in at the retainer. I'm curious to see what the difference is at the retainer taking into account the valve lash.