how much valve lift on stock springs?

I have a 71 429 with D0VE-C heads and was wondering how much lift the stock springs could take before I'd have to start running double springs ? I 've had triple spring heads in the past with a 700 lift and 300 duration cam but I dont have the money to do that again so I was just curious if anybody new what the biggest lift cam was that I could put in with the stock springs ? Thanks for the help !

What cam are you thinking about? How bigs the CID? What's are you using t for?

The bottom of the retainer will contact the seal before the springs bind.

stock springs are for stock cams. You cam card or manufacturer will have very specific matched springs that the prescribe. Never run stock springs with a bigger cam

x2 on that stock springs hardly handel the stock cam and springs are not that much money if you do the cam you should do the timing chain i think you can get stronger springs in a single so you dont have to mill the heads for the dual springs