Distributor Over-Advancing

You got ahead of me.

No, I'm saying if the cam is as I was told 250/264/110 in at 119 , then this cam has a very wide window of opportunity that with just advancing it back to normal, AND with no other changes, and with 4.10s in the back, it will already be a potent combination; based on the 150psi that the engine now has which is gonna climb quite a bit higher as the Ica is advanced some 9 to 12 degrees. It won't make near the peak-power of that Voodoo, but it will make waaay more power in the rpms that you normally drive.
By adding the 4.10s you will be increasing your TM (Torque-Multiplication) by 4.10/3.55= plus 15.5% throughout the entire rpm band from stall to shift. If your engine currently makes 300 ftlbs somewhere in the rpm band, say at 2800 with that 250* cam, then with the current combo, out the backdoor it will send 300x2.74x3.55=2918 ftlbs. But with 4.10s it will be; 300x2.74x4.10=3370ftlbs. This is sorta like your engine just became a 367 cuber.
Now if the cam in it is a 250/264/110 in at 119 with an Scr of 9.5, then the Wallace calculator predicts 151psi at 112VP@250ft elevation. And you already know how soft that performance is with the 112VP and 3.55s.... right.
But if you advance that cam to 108*, the pressure is predicted to rise to 163psi@132VP. This is a huge VP increase of 17.9% . Now if you had a 3500rpm TC, you wouldn't care much about VP, because VP is a low rpm ratio that tries to predict low rpm performance. But if you have a 2000rpm TC, this suddenly becomes very important, because with 3.55s you are stuck in that low-rpm band for most of your city driving. With 4.10s this will make a big difference. And if your TC is more like a 2400, then the high-pressure engine with 4.10s will become a blast to drive.
However, to run 163 psi may not be possible with .068Quench, except with full-time hi-test pumpgas.So with that large window of install, instead of a 108/53*Ica install, you could try 112@57* for a predicted pressure of 159@123VP. You might get away with 89gas at WOT/87 at cruising. It's gonna depend on how the .069 Q works out.

Now, to be fair, that Voodoo has a 58* Ica too, in at 106..... but it will have an effective overlap of 34* versus your 26 (in at 112), and it has only 107* extraction versus your 120 (still in at 112). So it will make a bit more power with it's higher lift and extra overlap, but it will also be quite hard on gas with that meager extraction. And to repeat, that power does not arrive until way on down the road with 3.55s.

So, IMO, get the 4.10s in there, and give your current cam a chance. Then if you still need more power down low, start advancing that cam until you get into detonation, and I would try a 112 installation right away with an Ica of 57*.
If you need to cruise at higher than 65(2400), then the 4.10s could be downsized a lil. For example 3.91s will get you 2400=72mph. With the 2.74 first gear, and higher pressure of the Advanced stock cam, I don't see this as a problem. And I like the 65=2180 with 3.91s. I have been cruising at 2140 since 2004; It's very comfortable. But hard to give the engine the mega-advance it wants.

But recall that I don't have a clue what cam is in your engine nor where it is installed; everything in this post is predicated on it being what I was told; namely a 250/264/110 with a stock install of 119*