If you are looking for a 2.3-16 5-speed, check my favorite web site for parts car-part.com The site has the on line inventory with prices of about 300 wrecking yards. There are two offered at $750 and three others without prices.

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Jim Villers
190SL, 230SL 5-speed, 95 E320 Wagon, 01 E320 Wagon, MGB, Boxster 'S', 190SL "Barn Find"