Schneider says they can put a roller lifter profile on a Stovebolt cam- - - -but it needs to be a steel (not cast) cam core to survive for more than a few minutes of operation. Fortunately, there are still a fair number of forged steel 216 and spray-oiler 235 cam cores out there, and they can be sleeved up to fit 235 cam bearings. A thin seamless steel tubing sleeve in a stovebolt lifter bore can make a MOPAR big block roller lifter fit, and center up on the cam lobe. I just converted a 216 block to those lifters recently, and I'm getting set up to run Torrington needle bearings in stock stovebolt rocker arms.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!