A Very Early car. Oct 1965.
Got a Malibu Grill in trunk and Leaves
If there's a Knee Knocker Tach by any chance still attached to lower dash. The redline will tell you Hp rating. In reality, it doesn't matter... Original engine is gone so even replacing with a similar won't make it original. With that rust, you have bigger issues to deal with.
At least it's not melting into ground