Since you plan on going turbo, and you need to start over, I would start with a mask that will work with boost now.
My go to would be $59, which is an enhanced version of $58 (Syclone/Typhoon/Turbo Sunbird/another vehicle that eludes me right now). The forum for $59 is not active, but the bins, XDF and ADX can all be had anyway. This will be a drop in for your '7730. Thsi will require a 3 BAR MAP sensor. WBO2 fuel control is one of the big features of $59.
$58 will also work and would be easier to tune, since it doesn't have as many features or flexibility that $59 has, but it works fine. There is a hack to make datalogging more stable. This isn't usally a problem using an Ostrich. but is definitely seen using an Autoprom. The hack is already incorporated into $59, FWIW. This will require a 2 BAR MAP sensor. This will also drop into your '7730.
Then there's $8F, which is from the Pontiac TGP (Turbo Grand Prix), and will be the closest to start with for your 3.5, since the TGP uses a turbo 3.1. It's pretty limited though and using with a manual trans can be a bit quirky, but has been done. It seems to be a code that was really just thrown together and not very developed. This will require a 2 BAR MAP sensor.
There's also $12P, which is an Australian code that was modified from a stock code, and works in the '7165, for a North American ECM option. This one will work with 1 Bar, 2 BAR and 3 BAR MAP sensors.
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