The cat distributor Pt # 4W0475 interchanges with Clark Pt #1806549. The Clark distributor is smaller in diameter at the cap than the Cat. I used the Clark dist. in a Cat V80E with the Perkins gas because the Cat dist was $750 & the Clark was $240.
The replacement Clark dist- which came in a Clark box turned out to be a Pertronix unit. I've replaced it twice under warranty in about 1 year
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