To fix it you definitely would need to pull the motor. Here is a photo of when I replaced mine. I did it when I was replacing the toe board in the cab.

http://rides.webshots.com/photo/1316417356041873203xTDshC

As you can see, there is normally no access to the area.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!