easy way to figure cam lift on sbc in truck? worried changing heads

[knightowl73]

4.10 rear in this truck, with 31x10.50's on it, im sure i hit 5 grand daily on the highway manually shifting it. but damn now im back to a cam problem. ill pull the numbers later, i cant find where i had wrote them down at, but i looked them up on mortec.com back when it was up and it said they were 350 swirlports from a truck. does have the newer intake bolt pattern too. the heads that were given to me have the same pattern, so i thought i was doing good for lil or no money. seems like i need to try a few things, but after it all i think you guys are spelling out its just plainly the cam itself if it isnt springs or timing. i dont know with my timing light how to check like you are saying. ill have to get one that has the knob i think. but after that its most likely the cam and if so i need to pull it and have another to go back in the same day pretty much.

[cableguy0]

Theres a bunch of stuff it could be. Its really hard to diagnose over the computer without knowing anything about the engine. Can you post a video of the truck making the noise? Yes you need an advance timing light to set total timing. You can also get a timing tape and put it on the balancer instead of buying a new light.Do you know if the engine has flat tops or dish pistons?