custom rear disc brake brackets

[dusterbd13]

im about to make a set of mounting brackets for my rear disc setup. ill be using the rear brakes off an 89 300ZX turbo nissan. they have integral parking brakes, 11.1 inch vented rotors, and a general design very similar to C4 corvettes. ill need to mae adapters to bolt it to my rear axle.

i was thinking of using 3/16 steel, as thats the thickness of the factory drum backing plate, and i wont have to screw around with machining axles or anything.

my only fear is of this being too thin, and folding up under hard use.

other though was to use 4 out of 5 of the axle retention studs and 1/4 plate. cut the backing plate up to use as a spacer, and just bolt these puppies on the outside. (mopar 8.75 housing)

what do you think? 3.16 be enough? 1/4? bigger?

thanks
Michael