Im building my b18 block for my integra and im hearing of all the different kinds of ways to reinforce the sleeves to keep them from cracking or warping. I know of block posting, filling the block, and obviously the block guard. What is the best method for high boost?

 

Sleeves would be the best option, next I would say filling, posting helps a little just like block guards that have been know to create issues with people around here.