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Author Topic: Need to determine engine code  (Read 2590 times)

Offline stevieray36

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Need to determine engine code
« on: August 08, 2007, 09:06:18 am »
I need to buy a rebuilt distributor and the engine code is required L or M. The truck does not have the 305 that came with it, the previous owner installed a salvaged 350. Is there a way to tell by looking at the distributor. I believe the difference is the vacuum advance.
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Offline VileZambonie

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Re: Need to determine engine code
« Reply #1 on: August 08, 2007, 10:02:36 am »
8th digit of the vin
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline stevieray36

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Re: Need to determine engine code
« Reply #2 on: August 08, 2007, 01:52:12 pm »
Again the engine is not the original and therefore the VIN does me no good. I went to the parts store and compared my distributor to one for an L code and one for an M code. Mine is an M code, it appears the only difference was in the width of the rotor mount. Thanks for your response VileZambonie you have been a good source of info thru this build. I hope I am done with the questions.
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Offline VileZambonie

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Re: Need to determine engine code
« Reply #3 on: August 08, 2007, 08:52:52 pm »
You can read the #'s on the front of the cylinder block on the passenger side right below the cylinder head.
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,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10
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