Wow, this crawln guy. A toy axle consists of a HUB DIAL, HUB BODY, AND A WHEEL HUB. 3 different terms for 3 different parts.
Yes you can bolt a ifs rotor and caliper onto a solid axle sure, Better brakes. Thats not a ifs hub body or wheel hub on the solid axle.
Ol blue To put your axle together, stock way, without modding it or drilling, or swapping a SOLID AXLE HUB GEAR into you IFS HUB BODIES, Get the knuckles, spindles, wheel hubs and hub bodies from a solid axle truck. You CAN re use the hub dial from your ifs, also the calipers.
If you cannot find a solid axle hub body, you can order the longfield hub gear, and put it into your ifs hub body, but this will not allow youi to get the c clip on the end of your birf, without machining.