[farmerjim]

if you want a sure bet as far as parts go then i would say an A or B, or prehaps one of the # series say 40,50,60 ect. if you wanted something out of the ordinary maybe an R or D or an orchard version. i personally like the B or GP. we just did our 50 over about 1 yr ago, we still use it on a reg. basis for some farm work. we also have the original tractor that my grandpa bought for the farm which is a jd H, which is in great shape and still runs to this day, i plan to go through it someday and overhaul the motor and a fresh paint job, that tractor will be kept in the family til i'm gone and hopefully beyond.