95yota4

hey guys great site. just got my 95 4 runner 3.0 auto 4x4. installed fuel pump and lines to get started fired up has a miss i think is a plug. here is the big one i can hear a knock in the motor. not at idle but up thru rpms. have been told that toyota put wrong bearing in # 1 main or rod . has anyone heard of this? i bought it right and dont mind fixing it just dont like to hunt if you all already know. thanks