Ok i my buddy wants me to put a bigger cam in his truck.
His valve springs are good to .500" but the cam he wants in .487"IN and .490"EX will he be pressing his luck with the cam lift being so close to the max valve lift on the springs?
Brad

 

Anyone? There are a set of Double Hump heads all stock, with a alittle port job. I would say put bigger springs on, but just trying to get a second opinon.

 

couldn't hurt to put the bigger springs on but its not necessarily needed unless you're running a higher ratio rocker arm.

 

How many miles are on the truck?

 

There is a boat load of miles on it. Its a 68 C-10 truck. We are just rebuilding the motor. But he is on a tight budget. Thats why i ask about the springs cause that would be another 200bucks he would have to save for. Spring, shims, valve locks, retainers, and then machine shop work. But the heads came from a buddy of mine, which were on a mudding truck and i think has Crane Cam Blazer springs on it.

 

hmmmm yes that's too many miles. I have a set of lt4 hot cam springs brand new and i also have a set of used ones with about 18k on them. let me know if you want them i wil selling the stuff
cheap. I have them for sale under my friends stuff that he was selling
here is the link.
http://web.camaross.com/forums/showt...threadid=73942

 

If I understand correctly the heads have been rebuilt with springs good for 500 lift and you're putting a 480 lift cam in the motor. If that is the facts then yes use them if a manufacter advertises good for 500 they build in a .060 margin. So the 480 cam should have .080 before coilbind. No problem with that combo. Frank95z

 

Thanks Frank that was just what i wanted to hear.
Thanks Brad

 

What Frank95z said, check for coil bind, retainer to guide/seal clearence and you should be ok.

 

Ok great I'll be sure to check that.
Thanks Frank95z and drop top steve.
Brad