So basically i bought a gsr longblock that lost compression and come to find out that one of the sleeves is cracked and i have a LS longblock at my dosposal that spun a rod bearing. I have already done all the research i can find on doing this build. I know everything from the b18c1 will go right into the b18b block (minus the oil squirters). My question is this. If i am running complete gsr internals, what main bearings should i use. I had already bought brand new oem gsr full bearing sets for the gsr before i ever noticed the crack. Can i use the gsr mains in a LS block with the gsr crank? Any information on this will be greatly appreciated thanks

 

Pretty sure you should use the GSR bearings since you'll be using the GSR crank. Everything else between the LS and GSR blocks is the same (deck height, etc) minus oil ports for VTEC and as you mentioned, oil squirters.

May want to wait for someone else to back this up, but I'm almost positive that would be the way to go.

 

My thoughts exactly. Thanks for reply, but would like more input as well. Appreciate the advice