I tacked the first tube and held it in place for fit test. I am using 3/4 " heim joints. This presents a little problem as the holes are 3/4" and the bolt on the stock idler arm is .45". I got 3/4X1/2" sleeve bearings and grade 8 bolt. I decided to get 3/4 X 5/8" sleeve bearings and drill the center link hole out a bit. This is because the hole is tapered for the ball joint and I believe this hole will get loose through the years if only the end is actually snug against the 1/2" bolt.