Looks like a good one to get a donor big block or some trim/glass off of. https://missoula.craigslist.org/cto/d/1969-buick-wildcat/6595018043.html
It'd be a shame to slaughter this. It looks pretty solid, and with a few trips to surrounding wreckers one might be able to piece together a workable interior. It looks like someone may have transplanted a 455 in there, it's got an HEI and the valve covers are wrong. This would make a good beater.
OK V-8 Buick People: Yes, this might meet the fate of many good running 64,65 and 66 Wildcats and Electra sedans....engine/transmissions harvested from 4 door cars for other projects. Mitch