Almost all Powerglide 235 engines used hydraulic lifters.
Powerglides were used in cars.
However, 53-55 Corvette 235 engines had mechanical lifters.
Those Corvettes had Powerglide transmissions.
Trucks did not use Powerglide transmission (except, see below).
All truck 235 engines used mechanical lifters.
Maybe not: a Powerglide was supposedly used on at least one model of Chevrolet truck around 1960. Most likely it had hydraulic lifters, but no one has posted confirmation/information.
The valve adjustment techniques are significantly different for mechanical lifters and hydraulic lifters.
This is important to correct adjustment/tuning.
Just to further confuse/confound us: over the years, an owner/rebuilder could change a 235 from hydraulic to mechanical lifters (and visa-versa).
