The 1250 has a port size of 1.20" x 2.00". The 1262 has a port size of 1.28" x 2.10". They are both .060 thick.
There is also a 1262R whose dimensions are 1.40 x 2.25. That one is .090 thick.
Andy
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88 coupe
91 LX NMRA Pure Street 5120
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