CNC Dude,
there is a Clevite77 bearing available that is just short of 1" in length. most of the bearings for Chevy/GMC sixes are 3/4" or less in length so the 1/4" addition should suffice to raise the load capacity of the rods.
doesn't sleeve bearing capacity increase as the square of the length? that's why grooved lower main bearing halves are frowned upon by bearing experts. (and why Chevy cross drilled cranks for decades.)
kalklein
