Not having a title is common as i think only the street legals had them. It looks like it may be a SL because of the lights, rear body and fenders but the rollbar isnt normally on them. If thatvhas been sitting outside the engine is probably seized at the crank. The manifold setup lets water run straight to the crankcase and wipes the bearings. Can you read the engine plate, is it a 290 or 340.