That's not the original question you asked (how much is entailed in removing the wings and tailbooms?). Removing just the tailbooms (not the wings) should reduce the labor, but I don't know by how much. (I worked on and compiled the SID work I referenced, but I did not contribute to the man-hour estimates.) Perhaps others will jump in here and provide estimates for removal and re-install of the tailbooms. We just removed and re-installed the rear engine on my normally aspirated 337G and it took about 22 man-hours. That's not all A&P (read: expensive) manpower, because one A&P and one mechanic-apprentice (supervised by the A&P) worked well.
Ernie
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