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Re: Gas tank year Differences, 73-81,-82-86,87
73-81 have smaller filler necks than 82-86. 87 has a sump pan (like a little cake pan) under the sending unit to keep the fuel from sloshing away from the in-tank electric pump they used that year. The pan interferes with the float on earlier fuel senders.
The other dimensions didn't change between styles (but are different between the two sizes).
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Joe
'75 GMC Gentleman Jim
'84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter)
'85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans
also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '87 C10, '87 R30, 2 '89 R3500 Flatbeds
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