The official word from MSD is that the 351C/460 and 351W cam sync oil plugs are no longer available and they will not make any more. They still have them for the 302 and Chev V8 but when that inventory is gone, those units will be unavailable too. A few people have told me that some EFI systems have trouble with these units because the signal they generate is a sine wave as opposed to a square wave. The only reason I'm looking for an MSD Cam Sync oil plug is just to try one out. I'm currently using an Accel 351C/460 Dual Sync distributor with the cap and rotor removed and the top opening capped with a machined aluminum cover. This is also what Kinsler sells for EFI applications. AEM also has a nice cam/crank sync oil plug for the 351W (which I understand can be modified for 351C applications). I believe they call it an Engine Position Monitor. If I was starting over, I'd follow Kelly's advice and go with an MSD 2346 Cam Sync Pickup Kit because it's simple and reliable.