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John,
Thanks for your response and the info.  Although I haven't called Don yet, I am
still curious if I should really swap it out.  The main reason is this - It is
coming back from the engine shop this week after a complete overhaul and I'm
wondering if it's really worth it.  Right when the engine went into the shop, I
tried to contact Tom Byrnes (I had read on the list that he has a 235 with a
290-D2 with 9:1 compression) to get some details from him about it, but he never
responded.  So now I'm stuck with a "brand new" motor that might still give me
some problems since the engine shop kept everything stock.

Brock Brinkerhoff
290DM