But... if it was easy, everyone would do it.
Appreciation of a personally modified engine (as opposed to a ZZ4 crate engine) is an IQ test.
If "cost-effective" was the entire purpose, nothing but nitrous would ever be used.
As an aside, a general warning on pushrod clearances:
1. you only need .010" clearance if the hole is smooth (Manton)
2. for larger diameter pushrods, the entire hole must be enlarged concentrically (unless the original smaller pushrod was obviously not centered)
3. for higher rocker ratios, (almost always) only the edge closest to the rocker shaft or stud needs more room
4. higher cam lift may need more room both toward and away from the shaft or stud
