Typing  "VW ACC motor" in Google  got me this;

http://www.theautochannel.com/autoparts/airbestvolkswagen/itemy7988_74532.html

On 7/17/07, Mariposa Charme <mariposaducharme@hotmail.com> wrote:
>
> Hello All!
>
> I just bought a 83 vanagon. The trouble is, the engine has been changed
> and I can't figure out the year of the motor in it. Which is causing me some
> issues cause I need to replace some parts on it.
>
> It's quite old, cause it has a carburator. It is either a jetta or rabbit
> motor (according to the previous owner, who cant recall anything more). The
> mechanic who did the conversion has long since left town.
>
> I have made a few calls, to VW, to the Bus Depot. no help
>
> There are two number on the motor, one that is engraved (stamped) in it
> (ACC066164)
> and another number, that is raised, (0261033730  21). These two number are
> located near the spark plugs. There is a another number that is raised,
> close to the water pump, under a vw logo (051553021).
>
> Does anybody have a clue where I can get info on this motor?
>
> Thanks a million!
>
> Marie
>
> Yukon Territory
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-- 
Jake
1984 Vanagon GL
1986 Westy Weekender "Dixie"
www.crescentbeachguitar.com