IO 360 C on Rear?

Without the full background of why I'm asking this question . . . is it possible to put an IO 360C on the rear of a 1966 337A? My understanding is that the only difference between the C and the D is an accessory or two. However, I think only IO 360Ds are specified in Cessna's Type Certificate Data info -- but have not verified this yet. I'll be doing that later this week.

If anyone has done this or had any experience with this, please advise what paperwork needs to be done to comply with the Type Data info for airworthiness?

Any other issues I'll need to deal with?

Thanks,

Keven
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GONG BONG