crank Main journal is 2.585
crank rod journal is 2.00
They already been machined for the rods and all but I don't know what size bearings to buy.. need help

 

You have to stick them in their respective bores, torque everything down, then measure the ID of the bearing. Then you'll know if you have the right size or need to go looser or tighter. Rarely can you ever just buy one size and be on the money. A lot of times, it takes a combination of sizes, like half standards and half "x's".