Hello.
I assume your replacement SP5 is the second photograph, and from that it appears to provide a decent start for your planned restoration.
To my inexperienced eye it seems to have many of the original features, which should make your work more straightforward, bearing in mind that many of the original parts are hard to come by.
I have recently searched for and acquired an SP5 myself and know how difficult it is to find the right bike, so well done in finding and obtaining your new bike, and good luck with owning and improving what you now have.
There are a number of people on this forum with extensive knowledge of these great bikes, and I’m sure they will provide any help and advice you may need with your project; they certainly made a significant contribution in my case.
I hope your new acquisition brings you much satisfaction.
Tom.
