I have a 1986 Mazda B-2000 and i am looking to find 3 inch shackles lift for the rear of my tuck does anyone know of a web site to look at?

 

you may try looking for ford parts since ford and mazda shared the same platforms. camburg.com may have what your looking for, if not from camburg, here is the links page from the camburg web site... hope this helps

LINKS | Camburg Engineering

 

Shackles? I haven't seen those in years, and there's a good reason why:
Ultimately, they will put additional strain on the leaf spring and wear them out quickly. They will try, and eventually succeed, to bend the other way (backward.)
The only way I know to avoid this scenario is to include air shocks to boost the rear suspension up and keep the spring arched the way they are intended to be.
But, your ride and handling will suffer horribly. I had seen this done many times in the old (muscle car) days and it always ends up the same. Either the owner can't take the stiff, horrible ride of the air shocks, or the leaf springs are gone in less than 6 months.
Extended shackles are a bad idea all the way around.

You'd do better with a block kit, one that goes between the rear (solid) axle and leaf spring. You have to remove the U-bolts and install the block as I have mentioned, then replace them w/the longer U-bolts in the kit.

Or, if the axle is mounted atop the springs now, remount it below the leaf spring. You would likely have to have the spring perk rewelded on the top side of the axle.