In 1982 Jackson Co, MI replaced it's Chrysler with a T-bolt. Also interesting (third hand info) was that the Chrysler's Hemi Engine on this siren was retrofited with an industrial electric motor sometime in the late 60's early 70's. The siren quit working sometime in the late 70's I was told. I never saw this siren with the Hemi engine on it but I do remember the cones and the electric motor on it as early as 1979.
Grapevine at the time the T-bolt went up it was someone bought the Chrysler with the intent of fixing it and placing it up on one of the lakes in Leneawee County MI. This was back in 1982 so it is doubtful anything remains of this siren as active duty but would make one heck of a tornado siren back in the day.
http://blog.mlive.com/citpat_history/20 ... f_col.html