my $.02 is go shoot the rifle first. You may just love it.
I like the 29" barrel on mine.
If you are looking for a project, go to the gun shop and find a beater.
Ask if anyne has an action. I wanted a project rifle and walked into a shop and just asked if they had this action and they had three.
Ask if someoen has a Mauser 98, Brownells has screw in 6.5 X 55 sweed barrels, the 98 is easier to find stocks for. There are more attachement made for the 98, like a 3 position wing safety (Think Win 70 or Ruger 77 MkII) so you can mount a scope. Actions were pretty reasonable and take a winter or two and do a custom rifle. Fit the barrel, fit the stock, finish a walnut stock, get down to 1,000 grit sand paper and then finish the wood with hand rubbed lindseed oil, 15 or 20 coates.
Another cheap project is one of the Martini actions from Nepal by Atlanta cutlery company ACC and clean up one of the 577/450 rifles that have not been touched. One of those would be a fun project and some history.
Heck cut it down and make a carbine or scout rifle out of one of the long levers. Get a book on the rifle and start with taking it all apart, cleaning every part, cleaning and sanding the wood, buff out the metal and reblue or custom paint. Rent the movie Zulu, those are the rifles.
The 577/450 is about like 45-70 in proformance. But 7 X the price, you may want to reload.