suspension

hi I own a 1985 toyota 4x4 hilux single cab pickup, when i got it it was rotten i have renewed the chassis from the rear of the cab. but before i start to put the ol leaf spring suspension back to geather i was wondering should i change the susspension on the front and back to coilovers. do's anyone know of a kit or information on how i would go about this. as i want to run this truck on and off road, so it would have to be road legal. hanks james