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Old 02-10-2013, 12:37 PM
MouseFink MouseFink is offline
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1955-1959 GMC Series 100 and 500 with optional Pontiac V8 engines:
1955...287 CI Pontiac V8 engine
1956...317 CI Pontiac V8 engine
1957...347 CI Pontiac V8 engine
1958...336 CI (small bore version of Pontiac 370 CI V8 engine)
1959...336 CI (small bore version of Pontiac 389 CI V8 engine)

Quick ID:
If the V8 engine in your GMC truck has front motor mounts, it is the original 1955-1959 Pontiac V8.
A 1960 - 1979 Pontiac V8 had side motor mounts and no provisions for front motor mounts. .
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