I know its probly not worth the trouble but I was thinking today about switching out my BBK 70mm TB and C&L plenum for the 78mm BBK TB. I have 24lb injectors already and Im going to backprobe my 02 sensors sometime this week to see if Im running rich at all before I decide to upgrade to the 78mm. Has anyone had the 70mm and then upgraded to the 78mm? if so is there any gain? Im not really worried about losing money for only a few HP since I could easily sell my 70mm and plenum for $100 + But like I said, Im only upgrading if Im running a little on the rich side. Im also swapping PI cams and Intake soon and figured the TB would be a nice extra boost since Ill have it all apart.