trying to figure out bearing size from stampings

[bfox507]

hey guy I'm in the process of rebuilding a l32 completely. I'm just stuck on lower end because i can tell if the rod bearings and the mains are standard size. I've searched every stamp mark I've found on them and can't seem to come up with anything reliable. when taking apart this block I've seem some signs that this engine might have been rebuild possibly and want to make sure the i know the bearing sizes before i buy new ones. any help with understanding what I'm looking for to figure out the size of the mains and rod bearings?

[Scottydoggs]

i hope you have a shop working the bottom end for ya. cause it wont last long if you just slap new bearings in it. we call that a 200 mile motor. ( if that most of the time) the 3800 is not a 350. the block will twist when you take the crank out, then it needs to have the crank mains aligned honed at minimum.