NEAT car - has buckets with no console, verified by the trim tag (756 interior code), and has the bench seat style shifter hump and bezel...my favorite combo for '70.
This one is pretty rusty, but looks doable...especially with prices where they are for '70 Chevelle big blocks. I don't think I would take it on, but someone will.
The seller doesn't claim that the original engine is there, but the current block is a CTX code so it certainly could be the born-with mill.
Link to 1970 Chevelle SS396 eBay auction
136370K176XXX