stock 516 heads and cam info please

[dkbug]

Running flat top pistons .030 over no mill with 516 heads with stock valves and springs on a 78 440. I recently aquired a .508 purple bump stick and was curious what stock spring would handle up to? Can I run stock springs? Is VC going to be an issue?

Thanks in advance to the experts at FABO,

Dakota

 

[txstang84]

Stock VC shouldn't be an issue as long as you're not running aftermarket rockers-if you are, test fit. Stock springs will probably float or bind with .500"+ lift I bet...I've only read about it personally, but I think anything over .480" with stock springs and such is not advisable. For that matter, I think the stock heads might require the guides to be cut down to allow for the higher lift and bigger springs...but I'm sure someone on here will chime in shortly with more accurate info.

MRL performance is a great source for general info...