I've been searching all day and mainly only found comparisons to the 8.8 and the 9", but not the 8.8 vs 12 bolt. I'm gathering the parts for my LS3/T56 swap for my '88 IROC and I'm trying to figure out what rear end to go with. I keep hearing a lot of good things about the Ford 8.8 however, it's about $650 more than a 12 bolt strange. My LS3 will be making about 475 rwhp. I guess what my question is, is the parasitic loss between the 8.8 and 12 bolt that much different/worth $650? I'm assuming not because they're based on the same design? Any input between these 2 rear ends would be greatly appreciated!