390 stroker build advice

Just my opinion but I'd watch that static compression with the huge chambered heads on the 318 bore. Use a dished piston and keep it under 10:1 and run a cam that will maintain cylinder pressure. Your 98 octane fuel is no more than our 92 and the dish and 9.8-ish:1 will run on our pump 87.
I'd steer clear of the noise cams too. Yes - they make power. But - a good engine builder will always make good power. in my opinon, no - they are not the best cam in any scenario where the idle sound consideration is taken out of the equation. They are designed for sound and IMO that is made with a concession to maximum power for a given rpm range. Pick a cam designed for the power range you want and it will sound like whatever it needs to.
I would suggest something like the XE285HL, the Lunati 10200705, or the Crane H-302-2. That Crane is old but has made a track determined 480hp with a mildly ported set of 596s, runs 12.80s and gets 17mpg on the highway in a heavy E body with 3.23s. It would put an A body close to the 11s with those gears and the right traction.