RB to B Distributor Adapter

After many years of being unavailable, we've reintroduced this CNC machined aluminum distributor adapter and special clamp which allow you to use a much more common and inexpensive "RB" (413/426/440) distributor in a "B" (361/383/400) engine. Compare to Mopar 3690275. These are designed for factory Mopar distributors, if using them with an aftermarket distributor, some modification may be required.