Thread: How can you tell a 305 from a 351?
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Old September 24th, 2013, 02:27 AM
62cdan 62cdan is offline
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Default How can you tell a 305 from a 351?
Hello Everyone!

Simple question for you V6 Pros...

I have a 1970 GMC 5500 Dump Truck/ Grain Truck.

It originally had a 305 in it, but the previous owner let it freeze, and cracked the block.
He told me, that, the engine that is in it now, came from a similar vintage fire truck, (w/ 22,000 miles on it). It runs fantastic, plenty of power, even in a big truck. A friend suggested that it may be a 351 instead.
Are there any identifying characteristics?
Thanks in advance.
-Mike
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