yes its sheet aluminum the first one was .032" 2024-T6 and the second is .060" 2024-T6 both done using a shear and drill press with a fly cutter for the holes plus lots of time with a file and a band saw. on the second one i didn't have a sheet the full width so i made a doubler and riveted the two half sheets together to make the full width. i have been running the second over dash for a while and have added a few extras since. currently i have a EGT, boost/drive pressure gauge, oil temp, voltage, trans oil temp, and a few warning/indicator lights for water injection and some aux systems. i work as an aircraft mechanic so i am familiar with sheet metal fabrication. the current project i am working on is a equal length tube header for my 617 made out of inconel 625. along with a matching intake manifold to run the compound turbo set up.

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1985 300D om617: 8mm M pump 175cc 5200rpm, holset he221w @ 30psi, large A2W ic, compounds on the way.
KD9AFT
A&P