Hypertech chip and timing ??

[withamc]

OK. I've got the engine, trans and rear-end swapped from my '86 convertible to the '93 GT. It didn't quite have the "Light-em-up-ability" of the convertible, plus I was getting some pinging on the top end. Timing was set to 16 just like it was on the '86. So I went to swap the computer and I find out the '93 already has an A3M with Hypertech Power Module on it. The '86 has the A3M1. I know most of you don't like the generic chips, but...
1) Since I already have it should I use the Hypertech? If I do, should I set the base timing back to 10?
2) Is there any difference between the A3M and the A3M1?
3) Would an A9L make a big difference?

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93 GT, CCM long block, GT40P heads, Crane 2031, 1.7 RR's, Moroso cold air, 73mm Vortech, 65mm TB, Cobra intake, 24# injectors, MSD 6AL, MAC GT40P headers, 2-1/2" BBK H-pipe (w/cats), Flowmasters, 3.55s, B&M Ripper shifter, Black Magic fan