Has anyone used the aluminum driveshaft from a Crown Vic? It seems pretty stout, much more so than the Aerostar's, but the driveshaft shop wants to sell me a custom made one. Of course. Do you think it will hold up? I think I should be sending about 290-300 hp to the rear wheels. Anyone have any input... $80 to shorten or $300 for new... I don't know if the amount of power warrants a heavier duty one. 

