As I mentioned on page 22 of JDM'junkies build thread, I have seen differences with the passenger footrest, which HS30-H says was standard equipment on 'DELUXE' models in Japan, and an extra-cost showroom order option on 'STANDARD' models , within that thread.
This is by no means comprehensive, so, please correct, add info.
Lets start with a S30 footrest Kats says (in the above thread) is from Fairlady Z from the beginning (Oct 1969 ) to 1973 or later .
I think the footest we see on the S30, originates from a preceeding model, the SP311/SR311, as my understanding it was an option from 1967 on, part number 74340-25500. But, the "hoop" part was chrome, with black "feet", and the feet were mounted inside the hoop. Maybe the feet were mounted inside, as the floor pan is narrower.
Did this SP/SR footrest make its way onto the prototype/ pre-production S30's or did Nissan go straight to the black painted one? Interested to know. Did the footrest go further back in the Nissan model range?
I haven't seen a -25500 one, just a grainy photo, but here is the start of my reproduction one;
It's not finished, I have to reproduce the rivets to hold the feet.
Anyway, back to the S30 one. Here are some differences, I have no idea how they fit in with models/timescales. The "hoop" shape doesn't really change. It is mainly the feet and how they are fixed. In no particular order;
As mentioned in the above thread, JDMjunkies footrest he got, had differing feet ( and for me the rivets say its original, see further down);
The feet on the first image from Oct 1969 to 1973, (top of post), has rounded feet, and both feet face inwards. JDMjunkies, has a more square feet, and one foot faces outwards.
Which brings me onto this one,
The right foot, as you look at the image, is substantially longer than the left, so when mounted the footrest would not be level. Does it mount on a block? It is original, as the rivet holding is correct.The original rivets cannot be removed without destroying them. On all the footests, there is a white/opaque plastic washer/spacer between the hoop and the foot.
Which nicely bring me onto rivets. There are two types I have seen, unless replaced by someone with a bolt and nut.
The left rivet, has an inside head that is cross hatched, as if its been hit with a chisel/tool to swell the end to hold it. The other side is flat and rounded (see below). The right rivet is aluminium/soft steel, and isn't as strong. I don't have an image of the other side. Maybe going to the right rivet was a production/cost change?
The other difference is the bolt that holds the footrest to the passenger floor. On the images above, they have a domed head, with a coachbolt square shoulder below, which lines up witha square hole in the foot. The later (?) type is;
A much narrower, taller domed head with a slot in the top. Again, with a square shoulder to line up with the foot, and also a round hole. I am fairly confident this is original, as I have had about 3 footests come my way with this same fitment, and all with the same hoop to foot rivet.
Did the footrest came with some specific washers (for under the floor), like the one a couple of images up?
The ribbed rubber foot grip is usually ripped on on original un-restored footrest, so finding one intact is good. Sometimes the original rubber grip looks like has been put on in a hurry at production, and can have the ribs running crooked. There is a Nissan part number for this, which is NLA. There is a re-production one on Yahoo auctions, but it doesn't look right. Yes, you could use some ribbed floor matting, but the finding the correct ribs, and then they look wrong as they are designed to lay flat. Not round a metal bar of a tight radius. The effect is the ribs are too splayed. So, I had to reproduce my own, 3D printed, so it looks correct.
Original behind, reproduction in front.
I hope that gives some an insight to the footrest.
Cheers
Ian