Your custom Kodiak TD is an excellent bow,very quiet,stable and forgiving,accurate as well.the riser is of the early 80's to mid 80's,something like 83-84.The limbs are dedicated for that kind of riser in the shortest configuration.On a B riser like yours with #1 limbs(Yours)you have a 60" bow.With #2 limbs and B riser you have a 62" bow and with the #3 limbs you have a 64" bow.In that time Bear was making just #1 limbs and you can reconise the period from the green tips and serial #.In the 70s Bear made 3 different risers A-B-C.and 3 different lenght of limbs1-2-3 so you could go from a 56" to a 68" bow.