How to determine Chev 350 bearing size?

[Totalled]

My neighbor just picked up a 350/350 for his truck and was going to put a set of fresh bearings into the motor... I'm GM illiterate. The bearings have no STD/010/020/ect markings on the shells... just GMM400 and like a 5741139 number... does that = GM part number = standard size?

 

[bobbed_84_toy]

My neighbor just picked up a 350/350 for his truck and was going to put a set of fresh bearings into the motor... I'm GM illiterate. The bearings have no STD/010/020/ect markings on the shells... just GMM400 and like a 5741139 number... does that = GM part number = standard size?

Measuring the crank would probably be the safest bet

 

[leadfoot067]

if they are what you described than they are prolly gm=standard...