They're all the same thread pitch and length, yeah? I can't get the number 1 bolt to start.. the one directly in the center.. all others are in. It came out fine, no problems, but will not go back in. The number 2 and 6 bolts weren't even there, just empty. I bought new grade 8 hardware to replace.
There's not much room to get a thread tap in there, and large potential to screw the pooch if I do. :fs2: Also, I don't have a tap and die set yet.
It's the bolt that requires the TBI to be yanked for access.