1800vw

We made this simple Drill Jig from an old bent 4-Bolt trailing Arm.

Just use the two bolts on the left to bolt this Jig to your 3-bolt trailing arms and drill the 1/2" diameter hole in the center. Next drill the upper right hole with a 13/32" drill and tap with 12 x 1.5mm tap.

Now your 3-Bolt trailing arm can be used with 3-bolt or 4-bolt spring plates.

Note: You can make the 3-bolt arms to work with the 4-bolt Spring Plates,
But the 4-Bolt arms can not be modified to use with 3-bolt Spring Plates.