Advice on moving forward

So was I close? lol
You are now well on your way. But I think tires will be next,cuz
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Here's my combo
Static compression ratio of 10.9:1.
Effective stroke is 2.79 inches.
Your dynamic compression ratio is 8.72:1 . Aluminum heads
Your dynamic cranking pressure is 178.73 PSI.
V/P (Volume to Pressure Index) is 153..................................................153
Notice my VP is only 8 points higher than yours. And this engine is a tire fryer with street295s or 325/50-15 BFG DRs, hence my 2.2 60fts.
I have a starter gear of 3.55x3.09=10.97
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You have a starter gear of 3.55 x 2.45=8.70
But your new TC could have an instantaneous internal hydraulic ratio of up to maybe as high as 2.0, so that 8.70, could be up to a 17.40 at Zero mph, or rather 1 mph. But this torque multiplication rapidly decays as the vehicle moves out. And the beauty of it is that it happens automatically. So bottom line is yours will be a tire-fryer too. You're gonna love it.
Since you admit to having detonation issues with 91,And if the new TC doesn't solve it: If it was mine, I would reset the installed centerline to about 104/ICA of 66* as earlier indicated. This will bring your Dcr, cylinder pressure back in line with 91 gas.If you can't get 104, you can go a little more retard but not advance; then you'll be set up for 3.91s right away. Yeah, I'm guessing 104 is the smallest ICL. You need to get the power-timing back close to 34/36 , even if that means bringing it in later after 3200/3600rpm. With the new TC, you may be able to run some more Idle timing too. So basically a whole new tune.