468 Big Block
320cc Pro Topline Aluminum Heads (2.25/1.88 Valves)
12.5:1 Compression
Dart Single Plane Intake w/ 1050 Dominator

The motor is going to be shifted @ 7000RPMs. Here is the cam that I want to go with:

Crane Solid Flat Tappet Cam
F-268/3814-2S-8
Advertised Intake Duration - 304
Advertised Exhaust Duration - 312
Duration @ .050" Intake - 268
Duration @ .050" Exhaust - 276
Intake Lift - .648"
Exhaust Lift - .669
LSA - 108

The motor will see a little bit of street use (likely 3000-4000 miles a year or less). I'm not at all concerned with the bottomend torque or how it's not going to perform well in street driving situations (because it will perform well at the track). Rather I am concerned with it's ability to last through the 3000-4000 street miles per year. One of my friends brought to my attention the spring pressure needed for this camshaft. It's 132lbs closed / 423lbs Open. Which could cause issues with the solid flat tappet life. However, one of my friends ran the F-256/3634-2S-8 in his street motor for years and never had any problems the cam required 132lb closed / 405lb open valve springs.

So what do you guys think, will the cam be able to take the street abuse? I don't want to go roller yet (should read $$$). I will likely go that route within the next year or two. Thanks.

Shane,

I think the cam is too big to shift at 7000. I think that cam needs at least 7500, probably 8 grand. I base this on the last version of my 454 +.030. It made peak power at 6500 rpms with ported ovals and a 255 amd 262 @ .050 solid roller, Victor Jr. and a Holley 1000. I shifted that motor at 6800-7000. The cam you are looking at is way bigger than that. Add in the rec port heads and the dominator, and your rpm band goes even higher.

With a cam like that your gonna need 4:10 gears at a minimum.

John:
Desktop Dyno is telling me that it peaks horsepower right at 6500RPMs and I was planning on shifting it at 7000RPMs. That's using my head flow numbers, carburetor, compression etc... I may try it to see how it works with my combo, worst case scenario I have to swap in a different cam.

BB485:
I'm running 4.11 gears w/ a 4 speed manual transmission.

Shane, its no big deal, if it does not work out you can always put in a differant cam. I have not looked, but am not sure if the I/E ratio of those heads warrant a cam with such a huge split pattern. I guess you will have to track test it.

One thing to keep in mind is my data is real world and DD 2000 in an educated guess by a computer. I still think you should try that 264 @ 50 cam you got from me. Check on the I/E ratio