I think it's actually a crime (or at least 7 years bad luck) to pass up a 70 series Colt, ever, for any reason.
But what you'll do with it is another matter.
In that regard I'll tell you; you never know how it'll shoot 'till you shoot it.
I've had lots of 1911s over 35 years of shooting: Colts, Springfield, S&W, Kimbers, modified, way modified, and stock.
A few years ago I bought a fairly beat up, used, 1991 series 80 as a base gun for a Ted Yost build. At the last minute I changed it for an even more beat up 1911 70 series I stumbled across.
When I got the 1991 back unmodified I shot it and guess what? It shoots like a rifle! Stock! Same chezey plastic trigger, crappy beat up finish, stock bushing, crown, slight creep in the trigger, etc.
The only thing I added was a piece of skateboard tape on the frontstrap, 18.5# spring, and I changed the rear sight (for a Harrison Retro) when it was so loose it started moving in the dovetail.
Don't get me wrong I love my Yost (so sweet!) and all the rest, including my old pin gun built on an essex frame, Clark barrel, S&W adjustable rear sights, and a Hogue beavertail (installed by Jim Hogue himself!).
...but that lowly, stock, 1991 shoots better than some and within 10% of the best.
/c