My GSr block is being sleeved at the moment to 84.5. I would like to know what pistons to use. I am familiar with all brands, but am curious to know if it is okay to use b20 pistons in my gsr block. If this is a stupid question sorry, but all larger pistons are made for a b20 (I know why). I just want to make sure the heigth is the same and if this will affect my compression ratio. I also found some Manley pistions that are made for a sleeved gsr. Any input would be greatly appreciated.