[kaisen]

If you're looking to restore it yourself and have a good time, that looks like a nice canvas

How useable is the interior? It appears that the steering wheel is missing, but that's easy. What about the rest?

Ferraris of that vintage are simple cars. They're expensive only if they are 'correct'. So if you're not concerned with originality you could find inexpensive alternative components for almost every conceivable mechanical bit. Interior too..... if you don't need the correct fabrics, leathers, and finishes they are as straightforward as any kit car or hot rod to upholster and trim-out.

Bodywork is bodywork, regardless of marque. If the body isn't hiding significant filler, then refinishing it with good results is also straightforward. Same with the exterior trim, like bumpers.... rechroming them doesn't cost any more than doing a 1969 Chevelle.

Figure $500-700 per wheel to restore the Borranis (and they're worth it!!)

The 4.0L V12 Ferrari motor wasn't exactly petite. The physical space is there for any host of motors. You'll have to plan carefully to mount and route things to preserve (not cut up) the original egine compartment.

If it were me, I'd consider a late-model all-aluminum GM smallblock (LSx) and T56 6 speed transmission complete with all of the accessories, wiring, and computers to make it plug and play. Maybe a LS3 6.2L from a 2010-current Camaro SS.

You're never going to recreate the sound or revs of a Columbo V12, so you might as well go with something you like, whatever that is.

I still think it should be well under $20K