I've got a bit of a different question for you guys and I apologize for asking it here but I know you guys can probably answer it. I don't have a B4 but I do have a project that may use B4 parts. I'm trying to find out what the hole spacing is on the 4 screws that hold the front bulkhead onto the chassis. What is the spacing from screw to screw going side to side and from the forward to rearward screws? Hopefully that description makes sense.