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Acceptable O-540 engines

540s

No reason why it should not work. They have two power ratings (235 and 250) based on engine speed. They are straight valved. The last four letter/numbers describe the accessory case/ components. You'll want one with the prop governor in front rather than the accessory case, and the oil sump with a bottom mounted carb/injector. A1C5 should be a bottom sump mount carb /FI . A series are generally found in Commanches. Be sure that the counter weights on the crankshaft are compatible with whatever prop you plan to use. Those vary with combinations of engine/prop /airframe and can be changed if required.
Hope you get a good deal.
T88
RV10
N968TP
 
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