My take on the oiling system crossover tube for the small block

Few questions:

Wouldn't I need to bush the lifter bores to do that? Which would also require dismantling the shortblock?
If bushing is not necessary, who makes the solid roller lifters that would drop right in?
Would they work with my hydraulic roller cam? or does the cam not care if the lifters are solid or hydraulic?
Comp cams