Aluminum or steel mid plate with trans shield?

OK, Here goes I’m running Big block Victor heads in a 72 duster. I have to run an engine plate so I bought a aluminum one from ARenginering to raise the engine about 1/2 an inch or more so I can make it clear the torsion bar do to my TTI headers. So what would you use aluminum or steel for the mid plate. When I raise the engine what trans shield would fit in this tighter area now do to raising it? Also do I use spacers etc….? To mount the converter to the flex plate do to the thicker aluminum one. Thanks guys in advance. PS. Pictures of mid plates mounted holding transmission in place would be appreciated.