Dave did this: http://www.peachparts.com/shopforum/showthread.php?threadid=81979&highlight=parallel+flow+condensor

I used a 15.5' X 24.75" parallel flow condensor in my 300SD and I'm happy. Hose crimping/redo is the biggest hurdle.

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)