H I'm building a gsr bottom end. By useing a b18c1 block and useing a b20/ls crank and rods and was woundering what bearing do I use for the main caps do I use the gsr since it's a gsr block and caps or do I use b20 since it's a b20 crank I know to use b20 rod bearing since it b20 crank and rods but unsure about the main bearings. Please help

 

use B20/LS bearings on mains and rods.

I have the same setup except I’m using LS crank/rods in a gsr.

 

GSR and B20 main bearings are the same part numbers from the factory. The rod bearings are different.