you use an EGT to tune timing. you use a wideband to tune fuel. The timing was pulled 0.7 degrees per lbs of boost. which is too much timing pull.

The thunderbird turbo is the same turbo used on the mustang, merkur xrti (or something), all the turbo 2.2L ford motors, they are all 60 trim, .60 a/r compressors, the manuals have .63 turbines, autos have .48 turbine. I should post the dyno graph of when we tried to run 16 psi, made like 250hp @ 4500, lol. Let off cuz it went higher than we wanted