I like the chain attachment bar that is on my B26 under the front and on the backhoe. Just run my chain thru it and bind it down. I then put a strap across the FEL arms as they have no sharp edges and strap across the dipper on the back hoe just as extra precaution. I use straps rated at WL 5200# and the chains are 3/8" grade 70.
As for chaining over the front end, I would think as long as you arent on top of the tie rods or your chain is not on the oil plugs on top of the axle that you would be good to go. Just look where your chains are riding to make sure they arent on top of something that will bend or break.