Interesting figures for the newer 24s.
The newer trucks have more capacity GVWR than the older ones did, so that also affects Cs, which I had not thought of before.
A C is an RV added to an "incomplete truck", which could also have been made into an ambulance, eg. So same C on a same size newer truck will eat less of the GVWR than with the older truck.
Above, we have 24s with more like 14,400 GVWR while our 1991 28 has 11,000 GVWR. Loaded we scaled at 12,232 (actually 5,560 kg). We are under on the front and over on the back. Can't be helped as it is at rating for the back when empty. How it is.
On wheel base and overhang, ours is 176" WB and 140" overhang. Maybe 30" more up front ahead of the wheels. So a "24" would be 288 with maybe 30 up front? So call it 258 less 158 WB = 100 overhang at the back.
158/100 = 1.58 and 176/140 = 1.26 so the overhang is more with our 28.
OK, so with newer Cs you should look at their numbers carefully to see what is really going on.