Yes, the Corse I design seems always to have been in a state of flux. You can see differences in virtually all photographs of the early cars and not just between the Honda and Alfa engined cars. Damper and spring lengths were never sorted properly and those triangular top mounting plates front and rear just added to the confusion. Lionel just ordered part numbers supplied by Hugh Carson with out much thought as to if they were right or not. IIRC we tried different lengths of damper on Micks first car but he resolved matters with extra bump stops in the end. Steve Ellis fabricated new damper mounts front and rear.
I guess the lesson is for anyone building to check suspension movements very thoroughly with the springs off to make sure nothing binds up or reaches the limit of its travel throughout its range.
Looks like you have the part numbers for new joints now Steve? Shaft length is another matter.