It's a 4500 stall 9.5" From Cope. Been in about 4 years.
Contacted Pro Systems about upgrading the carb before. If I did that I'd just do the alcohol setup as long as I was spending the money. The one I have flows 830 if I remember. I've had it for 7 years.
So far all I have done is put the rockers back on, changed the fluids and switched to an aluminum radiator.