Whats the tag on the axle say? The Eaton will work if you can find gears for them. No dont have any SQHD's but do have a 172 with 6.20 in it though. H172 and SQHD are going to be the back axle on alot of road tractors. If it were me id put a 106 in it till you break it. Your going to have to get a set of hubs made $1800 to be able to put any knid of 16" wheels on them. Ive only seen 1 SQHD/172 that has the 6 lug hubs on them and i own it, not saying they didnt make them just havnt seen but this one