Fitment notes: Standard top post 12V battery; some 1956 models may still have 6V systems - verify voltage before replacement
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Every control module on the 1955-1959 Dodge Custom Royal — where it lives, replacement time, and what it takes to program a replacement.
Distributor Assembly1.2 hr R&Rno coding
📍 Engine block, driven by camshaft or intermediate shaft
⚠️ Contains mechanical and vacuum advance mechanisms; 'programming' consists of adjusting advance springs/weights and setting initial timing with timing light; requires dwell angle adjustment after point replacement
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 1956 Dodge Custom Royal 315 cu in (5.2L) Super Red Ram Hemi V8, 4-bbl, 218 hp and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years.