Yes, Dwight. A weight saving at the front end could have been considerable by just manufacturing the water pump housing and pump itself in aluminum, blower mounting and idler in aluminum along with crank pulley and water pump pulley. Even an aluminum intake. Also tube headers as you mention and placing that heavy ass battery in the trunk on the passenger side. I wouldn’t be surprised if the weight distribution could have gone from the road test thought of 58/42 to 55/45 maybe better.
As for the Ferrari engine: I’m glad the offer was made just for bragging rights but the cost would have been high, warranty cost out the roof and no time or money to make the change.