Ken Powell wrote:

I have attached a picture of a '87 front cover and a '83 front
cover laying end-to-end.  Note that the '83 is about 1/2" taller
and about 12 oz heavier.  I you use an '85 or earlier front
cover on an '86 or later 13b you need a custom oil pan or an oil
pan and pickup from a '84 or '85 RX7 GSLE.  These parts are
available from Mazdatrix or Racingbeat.

Ken Powell

 
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