Likely will yield nothing obvious due to the cars state as you mentioned but still good to know(I don’t want to infuse fear, but when Justin’s sti motor popped, it had good comp and leakdown numbers but turned out to be a cracked ringland #1 on slug 2, with ring still intact and holding under power!!). Borescope may also not reveal much as walls are Nikasil plated and are incredibly hard to scratch and may not show any signs that visualize broken piston ringland but will be done anyway. Inspecting the buckets is fairly straightforward on these cars like most others, just a little more tricky to get to.