on the back of the bearing it will say .std or .010 or .020 that means standard or .010 over .020 over meaning the crank has been cut. check the rods and mains, if its a stock motor chances are it will be std-std but i had a 302 come apart .010- std before. you can also measure the journals with a micrometer.
"And the dynos rumbled, and God spoke 'Take thine five liter v8, install it upon thine car, and pwn the many ricers!' And thus Mustang, son-of-Ford, began to dominate the world 4 cylinder powered imports. And God looked down upon it and saw it was all that and a bag of chips