Springs

No thats why it is the way it USED to be done

You've got a 100 series with IFS have you?

Nah hilux heard from someone to put my old rears in the front, didn't give to much info why thou??

There is no advantage. It's unlikely they would even fit & would only ride rougher if they did. To improve the old sagging Hilux suspension springs were often reset with an additional leaf added giving more body clearance & load carrying capacity, but the only real solution was to replace all the springs & shocks with a set matched to the load carried giving much improved road holding, ride comfort & wheel travel. The early Lux suspension was certainly built down to a price.
Cheers Craig..............

Cheers guys