Which stroker kit for 470" b-engine

Ok.....then....

A. Not necessary with solid rollers (for obvious reasons) but recommended nonetheless?

B. Hydraulic roller operation completely satisfactory after the lifter bores are bushed?

C. Average ballpark cost to bush the lifter bores in a 400 block (and is it a permanent fix)?

D. Any other reservations about running a hydraulic roller in this application?