The Grant is all original, as it was when it was built in 1879 -- heel and toe clips on the buttstock, 31" barrels, and traces of the original case color behind the hammers. The real treat is when you take it apart. I don't know if Steve ever had the locks off during its tenure with him, but the interior of the locks retain their full case color and the springs are still so strong that my gunsmith (who is easily 6' 2" and 220lbs and no weakling) had to order a special spring vise to compress them to reassemble the gun. As folks can see, the gun has Damascus barrels, although these too have a lot of wall thickness left in them -- some 0.037" at the thinnest spot way out towards the muzzle. Folks have mixed opinions about shooting Damascus barrels -- for me, even though it is chambered for 2 3/4" shells, I am going to shoot 2 1/2" RSTs and wear a filet glove on my left hand under a shooting glove.
Steve was also kind enough to send me a copy of Cyril Adams & Robert Braden's Lock, Stock, and Barrel (Safari Press, 1996) which contains the following immortal quote: "The preferred double has external hammers, double triggers, and no ejectors. After all, it is reliably reputed that God shoots a Grant sidelever hammer gun with 30" Damascus barrels made around 1890." (p. 177) Sadly, once you've gone sidelever, I have a feeling you never go back.