I have a flat solid (251*/264*) in the Cuda. Been in there for 5 years or so. Mostly street with a little strip time. The car sees 1,500 miles or so a year.

Out of a dozen FT cams or so the last 15 years, I have had 2 fail. One didn't survive break-in and the other wore down several lobes after a couple of years.

I am really torn as to which lifter to use on my next build. There are as many horror stories about the rollers as there are about the flats. Right now, I am leaning towards the flats again. If going roller were to virtually GUARANTEE no failures, I would spend the coin and go that way. But there are no guarantees given the number of roller failures that I read about here and on the 'bullet.