I have an '87 GN that i am rebuilding, but have ran into a few problems. The engine has been through the machine shop and is now together, but I am missing a few minor parts that have stumped me. Looking for someone that might have or know the plenum bolts or dimensions, bellhousing bolts or dimensions, the spacer that goes behind the tensioner pulley, and the oil pump housing that the apapter connects to. Replaced the stock oil pump with a high volume pump from Mellings Racing, but the thread from the housing will not hold the adapter and filter because it is too short. As for the plenum and bellhousing, they are all stock and I just need bolts, studs, and any other hardware pertaining to or the dimensions if someone has them. Very interested in any of these parts if someone has them. Thanks.