I helped my uncle out this morning. He was having issues connecting to his MSD 7530T box. Turns out the serial cable wasn't fully seated in the box, that was buried under the dash. He thought it would allow for some base timing control coming from a MSD LS box. I'm thinking we can get around it by setting base at the most he'd run and then just set the step retards it 2* or so. It's got 3 retards, and a toggle switch an a +12v would be simple to wire.
Oh yeah it's a 4th gen camaro, 29.5x10.5, 7.50 cert, ladder bar, probably 2800lbs or so, sb2.2 (15:1), glide. The chassis is overkill for the engine. It made 800 flywheel hp, runs on vp x16, ran 9.2@144 with 1.2 60ft.