ok then so lets use the assumption that the b16b engine has the same piston to deck height as a b18c type r engine (although i personally feel it is slightly more in the hole due to the large dome of the piston). imagine the piston at TDC. at this point the rod and crank should be in a perfect straight line up and down 180 degrees. now add the stroke and rod length of the itr engine.
87.2mm + 134.9mm = 225.1mm
now to get to that same point using the CTR crank
225.1 = 77mm + Rod(b16b)
Rod(b16b) = 225.1 - 77
= 148.1mm
now this isnt exact, cause im sure theres other factors, and if you are only using this for a class i think this is as best an answer your gonna get without actually measuring them. 148.1mm
87.2mm + 134.9mm = 225.1mm
now to get to that same point using the CTR crank
225.1 = 77mm + Rod(b16b)
Rod(b16b) = 225.1 - 77
= 148.1mm
now this isnt exact, cause im sure theres other factors, and if you are only using this for a class i think this is as best an answer your gonna get without actually measuring them. 148.1mm