Flat tappet to solid roller...

One warm up and mash on it as long as you broke the cam in...if it's a HFT or SFT cam.

It's a solid roller cam, I will do 100 street miles tomorrow of gentle driving to let everything settle in.

Brake in on the flat tappet is start up and float rpm between 2000 and 2500 for about 10 minutes right? :-)
This is how I did it before and it worked well.