60 extra pounds on the nose of an airplane like a -10 is a HUGE difference and will be felt for the rest of the airplane's service life. That's assuming you somehow can move components to the rear to offset the C/G change. If you have to do the unthinkable and add 10 pounds of lead to the tail... well, that adds up to a bunch of utility forever gone from your airplane.
Heck, I spent a great deal of effort removing about SIX pounds off the nose of the -8 and was pretty proud of myself for accomplishing that much.
If the engine is a great deal, then grab it. Just convert it to a more suitable engine with the magic of cash or some horsetrading. That engine has value for plenty of airframes... the -10 just isn't at the top of that list.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.
Michael Robinson
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Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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