Air Gap vs. M1 Single Plane For Stroker

Mean416 said

72 Dart, pretty stock body/chassis for the time being.
340 based 416 stroker, forged internal balanced Scat reciprocating assy. Dished forged pistons. About 10.5:1 with the zero deck and MLS gaskets.

Basically out of the box eddy heads.

Cam is a lunati voodoo hyd flat tappet: Duration @ .050 (Int/Exh): 242/252; Gross Valve Lift (Int/Exh): .533/.552; LSA/ICL: 110/106; Valve Lash (Int/Exh): Hyd/Hyd; RPM Range: 2500-6600;

I have 1.6 ratio Hughes rocker arms. So real lift is 568/588.

4.11 gears

PTC 4200 converter
1-7/8 to 3.5 hedman huslers
750cfm race demon


This is primarily a street toy, go to the coffee shop, Friday drive to work kind of car. Will see very occasional strip duty but not that often.
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I am probably the least experienced guy to chime in here but it seems obvious to me.
M1 = 3000-8000 RPM range
Air Gap = idle to 6000 RPM
The M1 only has the advantage at 6000+. If this were a mostly strip and not so much a street car then I would say go for the single plane but just how damn fast are you wanting to get to the donut shop? Is it at the big end of 1/4 mile? That's where the M1 would shine but the AG starts working from takeoff. How much are you going to be in the 6000-8000 RPM range on your drive to work to take advantage of all that power the M1 gives you.
4200 stall convertor for the street? I'm still learning about convertors so I would be interested to hear about how it drives.
I have a Duster roller that I want to turn into a street legal drag car in a few years. Not much street usage but capable of going to the burger joint. It would kind of be the opposite of your usage but pretty much same set up that you have. 4.10 S60, 408", Auto/ high stall, Cal Tracs .... For that application I would do the M1.