The "scare tactics" seemingly never die? Folks talk about bearing shells becoming obsolete, ...but never state the facts. For no more than we bore out of a block to convert to insert bearings, the block can always be rebabbitted if 'one feels compelled to do away with inserts. Also, a person who is concerned about present insert bearing obsolescence can spend an additional $80.00 on an extra set of bearings to keep n the shelf to be used at a later date. A third option is to have the existing bearing shells rebabbitted as this method is used on many engines which parts have become obsolete. I have a Hudson Jet engine presently in the shop having this done. This is also a good option for G28T rebuilds. Bottom line is when there is a sincere will, there is always a way.