[yooper]

Anyone have any opinions on which would be better for re-conditioned
engine cylinders, "p10" steel (oversized), or channel chrome?

TDT

 

[mahlon_r]

If it were me, I think I would go P.010. Better oil consumption and easier break in and less expensive.
If infrequent use is in the future for the engine, then I would go with the channel chrome, as it can't rust as the P010 steel or nitrided cylinders can.
Good luck,
Mahlon