3,75 running great
AO Car Of The Year Winner 2015
Join Date: Dec 2003
71752782 should be the replacement. This is the original size SP=1,527-1,531.
Than thicker oversize bearings are available for crank re-grinds:
71752783 - SP=1,530-1,534
71752784 - SP=1,533-1,537
71752785 - SP=1,590-1,594
But to be honest I was always confused by alfa availability of standard and oversize bearings, piston rings, liners, pistons.... They always changed the part numbers, marking way (colors, dimensions....) I hate to order bottom end stuff for Alfa.