[JSeery]

Is there a problem with your current springs? The lifter you use is not a big factor in the spring selection. It will be a little bit difficult to use adjustable lifters with your reground cam without some block modifications. It can be done, but a little hard to adjust. I think your NOS lifters is the best selection.

Spring pressure is established at a spring height and thus the shims. With Chevy valves the keeper grooves are futher from the head and require a lot more shiming.