i probably would not have flushed the crankcase with kero.. but it's done.. so can't change that.
I usually DO add some diesel to the trans and diffy/hyd oil prior to chanigng them however.
if you don't mind the cost of the kero / diesel, and have a way to dispose of it. and the sump was wet.. I'd do this.
mix up diesel/kero/mineral spirits. a quart or 2 of cheap f type atf or dex/mer 3 and a couple pints of drug store 90% rubbing alcohol.
dump that in there agitate and rinse. ;)
grabs water real well.
then go in with utf.
that's pretty much my standard treatment on a new to me tractor if I suspect anyting other than immaculate maintenance by the prev owner.