[Jack21]

You won't regret switching to a hydraulic roller. The torque, mygawd the torque!

CompCams uses an OEM Ford lifter, and a reduced base circle cam to make this work. Mine works great, but you can't just slide in any FMS roller cam, or the lifters will stick up out of the bores.

Crane uses (or used to use - as the case may be) a shorter roller lifter and a standard cam.

Crower makes some interesting looking grinds for retrofitting non-roller 351W motors.

Rollers, however, tend to pull a lot more vacuum than flat tappet cams. The carb gets a stronger vacuum signal and may run rich on you when you first start dialing it in. Don't be surprised if you have to lean it out by 4 - 6 jet sizes to get the A/F right again.