Your also going to need to seal up the Smog Ports. I recommend the welding method.
Does your engine look like this?
This spider and the raised lifter bores with the cutouts for the dog bones around 2 ROLLER lifters makes it a roller cam motor.
Ordering replacement roller lifters is no big deal....roller 318/360's use the same hydraulic roller lifter.....87-92 318....chrysler fifth avenue's all day....autozone probably stocks them and the pushrods.