alright, im running out of ideas. even went through the fan to see if i can reach the top nut to get everything torqued. not sure if i can. Anyone have any suggestions or experience on how to torque that top nut without rotating engine down since i have the exhaust and everything hanging loose ready to get torque properly? thought about maybe fitting a swivel socket and extension somehow in there through the bottom or side, not sure, didnt look into it too much or try to figure something out. Took the o2 sensor off from through the fan to get a little more room. very much appreciated, very very anxious to get it together asap. (at least the other 3 are easy!!)