71 Dart get 408/ Trick Flow Heads....

Back in the mid-80’s, when I didn’t really know anything about anything.......one summer I put 5 cams in my 440 trying different stuff at the track.
I did know you weren’t supposed to run used lifters on a new cam....... but in my mind one or two trips to the track wasn’t “used” enough to not be able to use them on another cam.
This was back when all oil was pretty good, and there wasn’t much talk about soft springing for break in.
So...... I ran all the cams(4 new ones, and one of them twice) on the same set of lifters, no special oil, and no soft springing anything.
Zero problems.

A few years later when I was working at a machine shop I went through the heads.
The springs were set up at 155 on the seat and well over 400 open.

Those were the good old days when cams going flat was a fairly uncommon thing.