Keith! those lifters were mated to another cam. Correct? So what happens now that they are put on top of another cam? It takes 20 minutes to break in a set of lifters. 400 miles is a lifetime!
So you are planning to put in another cam and lifters, but are you planning to rebuild the entire engine because the crank and bearings were ruined by all the cam metal being pumped thru them?
Don't make me cry! I am too old!