AC Delco GM 1104060 Marine Distributor V8 EST Module Sierra 18-5484-1 350 454 Pulley - Crankshaft 001 oversize for everything 1972

001 oversize for everything 1972 & before)) GM 2771318 (stamped)

but they have an extra area of holes at the top of them where thru-bolted power steering units were able to go as well as  other than that they are the same in every dimension - Typically found on Early Bravo 1986-1991 & early Gen I)

135hp 1350

8L V6 185hp 4bbl 229CID engine applications

Mercury 35hp - 4cyl & 2cyl (1963-1969 & 1984-1989) KB-2A / KC-4A / KC-8A / KC-9A / KC-9B / KC-9C / KC-13A / AJ-54A

AC Delco GM 1104060 Marine Distributor V8 EST Module Sierra 18-5484-1 350 454 Pulley - Crankshaft 001 oversize for everything 1972Part Number(s) Included Stamped 1104060 which is an AC Delco GM Part number J1171 (Marine Grade Rated) General Application Compatibility GM V8 305 350 454 502 using a common EST style ignition module I don't know a ton about this beyond what is stamped on it, but looks like a standard marine GM V8 distributor using the common EST Module and allegedly replaced the following: Crusader PCM Pleasurecraft Marine RA107039D Indmar 556024 OMC 3857400 Volvo