the solution is that the Classic Industries seal kit includes two seal rings. One for front and one for the rear retainer. Its not nescessary to use both at the rear (as shown in my first drawing). I just have the job done. The main issue on the front seal (retainer) is that this fixation is not very good and I think it will leak sooner or later. The guys from oldgmctruck suggest to replace the retainer/seal combination with a new machined ring with "modern" NAPA seal. If leaking happens again I will do the improvement as a winter job.
Sven
1947 Chevrolet 3800 1-ton long bed 292 cui, GM 14 bolt rear-end, 4 x disc brakes In Frankfurt, Germany Pictures in the Forum Gallery
