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RX-7 1st Gen Specific (1979-85) RX-7 1979-85 Discussion including performance modifications and technical support sections

 
 
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Old 10-04-2013, 05:00 AM   #1
bowjangles
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How old is my 13-B?

Greetings:

I have a unknown year 13-B engine in my '80 Tr-7 roadster. It has a Hitachi 4bbl. carb on it. The engine number is B63798. How can I tell what year the engine was made? Really hard to get parts w/o this information.

Second question is: Do the holes on the black plastic throttle body spacer (under the carb) face up or down? My guess is up because the little tubes from the oil metering pump enter it from the back, but would like confirmation.
Thanks for your help in this matter.
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