365/410 in a duster with 3.23s and a 3000 TC will be an awesome fun street machine.
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I used to run a combo that by it's trapspeed was only 335hp and I often hear myself say, that it was my all-time favorite combo. Mine had a 223/230/110cam with lift of .538/.549
I currently have a cam about the same as yours, namely; 230/237/110 cam but my lift with 1.6 arms comes to a gross of .549/.571, and I am at 10.95Scr, with a Q of ~.032. . By it's trapspeed and weight this comes to 430hp.
I have always said that I liked the smaller cam better. I have had this 230/237/110 cam since 2004, and I'm waiting for it to wear out, so I can get rid of it and go back at least one size.
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BTW-1
Do not worry about the "lack of top end" with the 230cam; you will not notice it until you hit third gear, and crossing ~5000 rpm, which with 3.23s and 26.5"tires will be ~110mph...... how often will you be there?
In the first two gears to the top of Second (5600=85mph), she will be tires-on-fire fun.
BTW-2
Altho the 230/110 cam, makes peak power at ~5200, the plateau is long and relatively flat .............. so I take advantage of that, and rev mine to 7000 as often as I can. Make sure you have the springs for that, and maybe you can too. (I run OOTB Eddies.)
BTW-3
I have run as little as .028 Q with no contact with numerous blasts to 7000/7200 on bushed stock rods; and with a cooling system temp of 207*F.
BTW-4
Lemmee warn you right now, If your SG is set up too tight and you try to run 245s, I wanna call you a DA. They will spin you around every time the Secondaries open up in mid turn, so tighten then up to prevent that. Or better yet, install a Double-Pumper carb or anything with mechanical secondaries so that you can control the power delivery with your right foot. ( I run a Holley 750). For me, this did not stop until I got to 295/50-15s. These have enough sideways rubber that if I get into trouble I just give her a bit of clutch and she straightens herself right out. Don't be a DA; start with the biggest fattest tires you can fit in those tubs, on the correct rims, which I MO are 85% of the brande4d size. In my 295s I run 10s but they're not quite wide enough. For decent treadlife, I have to run down at 24psi; which doesn't corner all the well unless the tires spinning...... then it doesn't matter. So of course...... you guessed it, I spin them a lot.
275s should fit in the Duster-tubs without mods, on a rim with the right backspace. 85% of 275 is a 9.2 rim. I ran 60 series on 8.5s, which wasn't too bad except again, at a reduced pressure to keep them flat to the road, when traveling straight ahead.
For BFGs or Coopers, in 295/50-15s I set my cone-type SG to 120ftlbs turning torque with 75/90EP oil to which I added about 5ounces of fish-oil SG-additive that I buy at the GM dealer. With 275s I set it to about 105ftlbs
BTW-5
The TQ is a great street carb. I love 'em.
But when you start flicking the car around, they can get you into trouble in the blink of an eye. The ratio of primary to secondary, being so large, means that you will be forever looking for more power in the turns. This, of course means gas pedal. And when the Secondaries open, if yur not careful, the engine will flip like a switch from not enough power, to too much power, and chances are you will not be able to react fast enough; or if you do, you will over-compensate, which can be just as dangerous, especially with skinny-tires and lots of cylinder pressure. I suggest, that if you get into this style of driving, (my style), that you get a sq-bore mechanical secondary carb. I have found the 750 to be satisfactory. A 650 might be ok too; I just happened to have a 750.
BTW-6
Are you absolutely sure your pistons are .012 ABOVE deck? I mean I think it will be OK a; t .039 less .012= .027.... cuz Like I said I have run .028 with no contact. But .012 is actually about where the KB107s in my combo ended up, except BELOW deck, so I just gotta ask.
I know you didn't ask, but with me, you get everything I got on the first go-round. I know you're not a DA; you engineered a nice combo. And I didn't call you one. I said I wanted to call you one if you install 245s; but you won't install 245s, right?
