Measuring the cylinder bores tells you a bit of the story of an engine's life from the machinist to the operator. This block measures pretty darn good with respect to taper (.0005 max) and out of round (.0005 max). Judging by the consistency in the bars without the head bolted down I am going to assume this engine was bored without a torque plate on the head surfaces.
The bore measurement (4.3730-4.37250) is a bit tight for a 2618 piston. Wondering if whomever bored this block out assumed the pistons were 4032 because the clearance would be perfect. I should be able to get .005ish per cylinder with a quick hone job.
While I trust my old Sunnen dial bore gauge I broke out my economy unit to double check my measurements.
For those of us on a budget (hand raised, pb&j in lunch pail) the Shars 303-4746 2-6" cylinder gauge is a fantastic value. Up until last year the only extended dial bore gauge available aside from the prohibitively expensive Sunnen units available from Goodson or economy units that utilize extensions that I don't not care for. This 17-in long dial-board gauge fits the bill for measuring cylinder bores and main journals and is under $200. I can also squeak it into the cam tunnel on a big block. The only desire I have for the Shars is to replace the .0005 resolution indicator with a .0001 model.
View attachment 1716374349
View attachment 1716374350
View attachment 1716374351