I called Patrick's and they said" They misspoke in the instructions, it should say
Cap instead of
Nipple.
Just screw on a cap that fits a 1" inch galvanized gas pipe.
The cap is rounded and it will seat-up to the oil seal nicely when punching out the oil seal and the two bushings.
The problem is, the 1" inch pipe cap O.D. is 1 3/4" inch, which is to large for
ArtA 46' truck.
The 3/4" inch pipe cap O.D. is 1 3/8" inch, gives you a little more room.
I guess the best pipe to use is: 6' foot x 3/4" inch with a
3/4" CAP screwed on one end and squared off on the other end.
You could use the 1" pipe and grind down the cap to 1 3/8" or find a thinner wall cap if they exist.
The 1946 truck torque tube bushings O.D.
1.720 front
1.685 rear
The pipe cap O.D. should be smaller than 1.685
If the pipe cap O.D. is 1 1/2" inches would be ideal.
Pound away.
