6130463
Would be a US/Canada 911 TE, 140 hp, 2341 cam, and the engine type should be a 911.51, which indicates it was originally in a car (probably yours) with a 4 or 5 speed manual transmission.
At least, that's if I'm reading the information at the Porsche web site correctly. Go to:
http://www.us.porsche.com/english/excitement/classic/911/1973.htm
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Jack Olsen
1973 911 T sunroof coupe
http://members.rennlist.com/jackolsen/Jalopy.html