The seller sure thinks it might have been a LS6 car - still has the SS454 CRV rear, with an original LS6 engine, but evidently the partial VIN stamp has been added...so who knows. The late February engine seems to line up with the 03A build...but why not show a picture of it in the auction, so the bidders can decide?
Not a bad project truck all the way around, but I wouldn't want to pay more than NOM El Camino money for it.
Link to 1970 El Camino SS454 auction
136800K176942