I just checked my AERA crankshaft manual and it lists it as 2.812 - 2.815 The World blocks had what was in my opinion a " fair" seal retainer and also some blocks had a problem with a machining process that must have been just wrong. Where the retainer slides in, there was a noticable ridge or step that was towards the bottom half of the side walls. Something is just not right, you shouldnt have that much trouble. Hope you get it figured out. 
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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