I have a 1992 John Deere 8a backhoe installed on a 2 wheel drive 39 horse 1992 John Deere 1070 tractor. I wanted a subframe backhoe and had a budget so I found this one. The 1070 is the size I need but i should have held out for a 4 wheel driver tractor. Now i'm thinking i could look for another John Deere 4 WD tractor to install the 8a hoe onto. However, I'm not sure what tractors i should look for and are compatible. Any help or ideas would be greatly appreciated. thanks