Hi BrianG,
When I got the Case 446 in the mid 70s, it surpassed the other machines in what I needed at the time. The Case GTs evolved from Colt GTs which were hydraulic drive and Ingersoll GTs evolved from Case. The Case GT division was separate from the bigger tractors and was bought Jack Ingersoll in the early 80s. When I retired from the military in 1994 I restarted my limited lawn care business with a 1985 Ingersoll 448 and a 1989 Ingersoll 4018, both with Hydrabaggers which is a collection system hydraulically driven by the tractor. Great machines and with 8 X 16 rear tires. I did lawn care in season and snow removal in winter with both machines, a 54" plow on the 448 and a 48" snowblower on the 4018. I have since stopped doing snow removal, sold the 448, still have the 4018, both of which I had repowered over the years. I now do limited lawn care with A Scag Tiger Cub and a Hustler X-ONE with a rear discharge deck which does cemetery duty.
Mad Mackie in CT