Originally Posted by 35WINDOW
I think it all depends on how much hp/tq you are looking for-if those are the stock aluminum GM heads, they were made by Edelbrock (look at their part#60459-the GM head has a 2.25" valve in it, otherwise the same)-
If you are leaving the compression alone (?), and using the GM heads, I think you have a couple of choices:
1. Use the stock GM Cam
2. Use the Cam Edelbrock has designed for this Head (which will dictate new Lifters):
Performance Camshafts, Lifter Kits and Matching Valvetrain from Edelbrock - Cam Card Locator
3. depending on how serious you are, you could contact a custom cam designer (someone like Mike Jones):
4. buy an "off-the-shelf" cam (which can be hit or miss sometimes, depending on the skill of the selectee)-
I would certainly (at the very least) have the Springs checked (you will probably have to replace them)-
One thing leads to another, and pretty soon you are building a custom engine-watch out! Horsepower is addicting!
Edelbrock doesn't design any cams, they're just reboxed white label cams, many "off the shelf" cams will do better than their stuff.
As for springs, I would assume you'll probably need them and should be considered as part of the cost of a cam swap. There are plenty of good cam guys out there, Mike Jones is good, as is Isky, Lunati, etc. For the relatively little cost difference I would go with a custom spec'd cam over a shelf stock cam. You can't go wrong with Jones, and he'll probably steer you towards PAC springs to go with your cam.