The Frog is my favorite car, I have seven of them, not couting some rolling chassis I have a three frog projects I am about to start. I would certainly not run your car, complete and make it a Shelf Queen. You can easily purchase a good condition RTR Frog runner here or on Ebay for the $50 to $100 range depending on condition. The great thing about Frogs is that they is a large abundance of spare parts availible, both used and NIP, so your dont have to fear wreaking it. There are also a ton on vintage mods for them on the market, which I like to do to my Frogs.
Have Fun
Tom