I think (hope) you meant under-sized?
Are you going to gage the bearings? You may need the .001 or .0006 bearing if there is some journal wear. Or has the crank been machined?

 

so far as i can tell its all new. yes under. from i have read they used the undersize bearings to get exact clearance in the factory. talked to a few dealer shops i get parts from and cant get the factory kits for em. tried some places like ecklers too. i dont know what to think all the clearances are good so it could be a block that got sent back and was remaned but seems like it would have a vin on it then. still has the bar codes sticker on it. dont know if i can read em though.

 

i hope it all works right. if not ill have the motor out of the car and am thinkin about gettin punched out to a 383 once its out but i should have a few yrs before i want more power bad enough to change motors again.