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I have heard that .500-.510 is about the most lift you can go with using a stock set of sbc heads. I have also heard that .540 lift is the mximum lift with a set of sbc heads using a solid lifter cam. Just out of curiosity can someone set this strait?

The lift of the cam determines the spring rate you need to use. It's best to have the spring pressure checked to see if they will work with your cam if you are not installing new springs. Too much spring pressure will wipe out the camshaft lobes, not enough, and you have coil bind, dropped valves, and other nasty stuff. Not many stock springs go to .500 with a hydraulic. Solid lift cams will be even less. This is one area I don't recommend skimping on.

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Stock z28 springs will go around 500 but push it. Better to go stronger if it is really gonna be run. Wouldn't go much more than 484 lift it it was me unless you plan on getting dished pistons to be safe.
I have a 284 comp cam and springs i my 400 on stock heads that ran very well but can run stock z28 springs and pistons.
My 350 now has rollers and bigger cam

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Like I said I was just curious. I have a an edlebrock cam with .488 and .510 lift I also had to buy the edlebrock springs to go with it they fit stock heads. I agree when you said this not the area to be skimpy.

Good deal.

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