Starting in 1950, all Powerglide-equipped engines had hydraulic lifters. Trucks had solids all the way to 61, and the switch to all hydraulics in passenger cars didn't happen until 56 or so. Check the stamped number behind the distributor to get an idea what your 235 was in originally.
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!