[blykins]

If you're going from a solid roller to a hydraulic roller, then yes I would change springs.

A 495lb open pressure is too much for a street oriented hydraulic roller lifter.

Most of my hydraulic roller stuff gets about 160-170 seat and 385-400 open.

I personally would not listen to any Comp Cams phone tech. Their recommended springs don't always work because every engine is not a SBC. The last time I relied on them to recommend a valve spring for a hydraulic roller, the valves were floating at 5400.

With as many engine builders as there are on the forums, you can directly ask what works and what doesn't.

Lighter spring pressures on solid rollers do not help....they hurt as it allows more of an opportunity for valve control loss.