Flywheel/Clutch ideas

I too with my lil 367, find the factory FW a pleasure; it makes taking off with my 10.97 starter gear, a blip/dump it and go deal. I have enough starter gear and engine torque to run a lot less FW, but I really like the lil launches a blip and dump makes; and it really stabilizes my 230* cammed engine at 500/550 rpm.
However, that said, IDK about the OPs combo. I'll guess he has more torque everywhere than I do,lol,
plus the BB already has more flywheel internally.
Ima thinking YR nailed it.
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But I just gotta repeat; A manual trans car has the engine married to the tires at all times that the clutch pedal is up. There is no fluid coupling. That means, in bumper to bumper traffic, with 3.55s, you can get into situations where you're gonna be riding the stinking pedal, a lot, especially if your engine needs to idle at over 800rpm.

I solved this problem in two ways; more starter gear and slower idle speed.
I grabbed a Commando trans with it's 16% lower first gear (3.09 versus 2.66), and
I installed a dash-mounted, dial-back, timing device, that has a range of 15*. When I need a slower idle speed I simply take out timing. Thus I can get to 4mph; And the heavy flywheel, just keeps on turning. No more toeing the pedal, and heating the clutch.
Without these three together, My car in it's current combo, as a DD, which it was for many years, would not be near as much fun, or entertaining.
Yes, I could run more rear gear, but you know how that goes.... I even bought a GVod and ran 4.30s, and more, for times. But I like running 65=2240 in a DD because 2240 is just after reversion quits, and gives me a shot at the best possible long-range mpgs. As a DD that was very important to me, cuz I spent an hour on the hiway every day commuting to work and back. Another thing that was important to me was to burn 87E10. Between those two,over more than 100,000 miles, I saved a big old pot of cash. Which,of course, I spent on the kids. 40 bucks a week doesn't sound like much, but it adds up to 2100 per year, times many many years.

What's this got to do with flywheel/clutch ideas?
Well; firstly, you automatic guys got it easy. Your tune below stall can be totally fubarred, and you might never even know it. But us M/T guys spend outrageous amounts of time in that lower half of the powerband. So it's gotta be right to be fun.Else the car turns into an occasional driver.
IDK anything about BB cars, but I know a bit about tuning stuff. And a bit about hard to appreciate combos. ( which I'm not alluding to for the OP),just saying. And M/T cars are always a bit of a chore. The Dyno-tune is just one tiny aspect of street-driving, and the bigger and/or more powerful the engine, the less applicable it is. The manual trans car, running on the street, with 3.55s, is gonna spend most of it's life between idle and 3500 rpm, with occasional forays to 4000 (35mph in first gear), and ever less time at higher rpms. In fact with 28" tires 5800 rpm is 51 in first, and 71 in second. These are not speeds commonly found in any city in Manitoba, where I live.
As to running more gear, think about it; Op mentioned an unfathomable to me, amount of torque. Which is gonna annihilate the tires. With any gear.