cam

Hello guys. There is a video on YouTube of a dude with a 4.3 S10 with a .500/.500” lift cam in it and He says he is using all stock internals and that just installed the cam, but everything else I find about cams especially with this much lift say that I would Need to get my heads modified and...

So I want a cam that’s going to increase hp and torque that’s reliable and I don’t have to do any machining or valve train work to. Any suggestions on cam options or what specs I can get away with? I have a 2000 zr2 4.3