78 bronco lift

Picked up a 78 Bronco from west TX, really good truck with zero rust. Has a 400 2bbl, but will need a rebuild.

Question is on a lift kit, can a use 3/4 ton or one ton front coil spring instead of buying a "lift kit" I know I will need longer shocks, but is a lift kit for that model simply 3/4 ton or one ton springs on the front? The 1/2 ton measures roughly 12", the 3/4 ton roughly 14" and the one ton is 16". I think my cousin added 3/4 ton spring to his 1/2 ton truck with a 460 and it sat a little higher in the front.
Not going wild with this, i want to fix it all back streetable with the stock 400 motor, 33" tires and 2 to 4" of lift.

Not to try to send you off, but a good source of info for lifting trucks is at www.truckaddicts.com. Hope this helps, as you'll find more specific info for the lift kit. :)