Dominator Slots

HOF155 – Dominator Spheres This pack contains three metal kits, each composed of a robotic body propelled by tentacles, and a sprue of six different limbs which can be added in any of the six mounting slots and bent to your choice of pose, meaning huge variety. CORSAIR DOMINATOR PLATINUM RGB DDR4 memory brings RGB lighting powered by all-new CORSAIR CAPELLIX RGB LEDs to the award-winning DOMINATOR Series.

Recently purchased a drag car and trying to tune so I can take to the strip for my first ever trip down the 1/4 mile
I have a 3-circuit L-9375, that has no intermediate air bleeds and the blocks have no power valve orifices. Just bolted the carb back on tonight after clean and rebuild. Before that though, the engine suffered from partial throttle stumble, the plugs were fouled and exhaust was pig rich (I have not used an O2 sensor to measure). I'm hoping the rebuild will help things.
Also, I can't see any of the T-slot from the bottom view with throttle plates closed. As I understand it, opinions vary on whether this is significant. I have read several threads about the 2 circuit conversion and wondering if I need to convert.
The car is a 72 Duster, 446, comp 650, 12:1, 3500 stall, 4:56 gears, and 3300lbs with driver. Its going to be mainly strip with light street use.
Questions:
1. I finding it tough to tune the idle. Only pulling about 6.5 ' vacuum and it doesn't seem to vary much when I adjust the idle screws (though I haven't tried yet since the cleanup).

Dominator Slot Car Chassis

2. What effect does not having intermediate bleeds have?
3. Should I to switch to 2 circuit?

Dominator Slot Car Chassis

4. Should I elongate the T-slots to provide the .010'-.020' past the throttle plates that some suggest?
Thanks in advance

All images and descriptions are for illustrative purposes only. Visual representation of the products may not be perfectly accurate. Product specification, functions and appearance may vary by models and differ from country to country. All specifications are subject to change without notice. Although we endeavor to present the most precise and comprehensive information at the time of publication, a small number of items may contain typography or photography errors. Some products and configuration may not be available in all markets or launch time differs. Supplies are limited. We recommend you to check with your local supplier for exact offers and detail specifications.

Adobe product box shots reprinted with permission from Adobe Systems Incorporated. Adobe^® products are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States and/or other countries.Autodesk screen shots reprinted courtesy of Autodesk, Inc.

MIL-STD 810G testing is conducted on select MSI products. The testing is not a representation of MSI products satisfying U.S. Department of Defense (DoD) requirements or for military use. Validation process is done in laboratory conditions. Test results do not guarantee future performance under these test conditions. Damage under such test conditions is not covered by MSI’s standard warranty.