Hello folks!! its time to give out a door prize. When my wife gets home I will post pictures of them. I picked this set of good looking exhaust manifolds up years back. Part number left side = 53010187. Rightside= 53010186. With W3 and maching 2869 number on the pair. Intake size 1"3/4 tall and 1"3/16 wide.ID the exit hole is 1'7/8.ID They both dump out the back at a scoosh over 45 deg. I was thinking at the time they where good flowing manifolds. I was turning left on dirt in them days and I can't remember what 360 they came off of. I am sure they where 4bll manifolds. So far all I can find is 73 and down part no# on all the serch places on the net. So if you have any knowledge on this or secrets let me know how and where to go. or your thoughts Thanks Mike.