If its a GMC look at the machined surface next to the distributor. The
serial number will be there and will start with the engine size ie. 302XXXX
or 270XXXX. Rich Fox
-----Original Message-----
From: DOUG ODOM <popms@thegrid.net>
To: Nafzger <nafzger@vtc.net>
Cc: land-speed@autox.team.net <land-speed@autox.team.net>
Date: Thursday, October 04, 2001 10:27 PM
Subject: Re: 6 cyl GMC
>Howard, Check the block casting number. If it's 3733340 or 3837012 it's
>a 261 with a 3.75 bore. The head casting should be 3703570 or 3836850.
>Block casting 3836233 or 3837004 will be a 235 with a 3.56 bore. Head #
>3835913 or 3836848. If you get any other numbers send them to me and
>I'll find out what it is. Doug Odom in big ditch
>
>Nafzger wrote:
>>
>> List,
>> I was given a 6 cyl GMC engine from a 1957 school bus yesterday. It's
>> complete except for the air cleaner, water pump, and generator. The guy
said
>> it was running well when he took it out and scrapped the bus a couple of
>> months ago.
>> How do I find out what I have? It's probably a 270 but could be a 302 or
>> something else.
>> Thanks,
>> Howard Nafzger
>>
>> ///
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