Wade, I have been making T/D bows for 19 yrs and the groves T/d is no different than a 3 piece except it is only done on one half of the bow.
Making a T/D from a bow that is allready shaped and finished is not easy but can be done if you go at it in the right way.
don,t know about the '59 kodiak,as i have never handled or shot one .
if i can be of any help let me know Take Care Harold