Who on here accually will buy a used hydraulic flat tappet cam with suposedly matched lifters, and run it?

We have a guy comeing inn next week with an older GM, and he has a used cam from a "buddy" and he wants us to put it in. I told him we would but there is absolutely NO guarentee that its going to work without any issues.

He didnt understand that at all. I told him I would feel better if he bought a new set of lifters becaust you can not guarentee the lifters didnt get accidently switched around.

Hopefully he either buys a new set of lifters, or I scared him enough that he just gets everything new.

I have done it myself, but I pulled the cam out of a running engine, and swapped them out right there, no boxes duct taped together.

Kasey