Originally Posted by Miguelone

How did you measure your clearances?

You need to remove all oil from the bearing surfaces, grab a piece of plastigauge stick it on the bearing surface, tighten the bolts to correct tension(46-52nm for Crank bolts & 14-16nm plus an additional 60-65 degrees for rod bolts) DO NOT TURN THE MOTOR. Then unbolt and check the width of your plastiguage with the supplied card.

You won't have clearances of .001(Thou or MM I'm not sure which you mean but either is a way smaller clearance than you need)

Clearances are.

Rods

Standard 0.2-0.3mm
Limit 0.4mm

Mains.

Standard 0.05-0.18mm
Limit 0.3mm

Yes you can just chuck ACL bearings in but during assembly you WILL need to measure again to ensure you have correct clearances. The standard bearings are all graded with the grade of each bearing in the engine stamped on the front most counterweight on the crank(Mains on the top, rods on the bottom, left to right = front to back) If you want to go stock bearings you'll need to order the right ones or go up in sizes depending on wear on the crankshaft itself.