Gearing ?

A 360?!
I love those
The 11.5ET target is easy enough with a SS suspension; requiring a P/W of just 8.1. With street suspension, you could lose a half second on the line,tho, and so I would target 11.0, which is a P/W of 6.85.This is about 123mph. 3.55s will get you there at 5700 with 27"tires and 5%slip.
At 3200 pounds, this is 467 hp.
With a 100 shot of nitrous, your engine is an easy build of 367hp.With the way that Nitrous works. you may get away needing a little less NA power.
The 360 will be a much better fit to your stated useage.

Now, this is a really neat build, cuz you can actually optimize the engine for Streetability, and dial in the ET with the Nitrous.
So, Now, you don't actually need the $2000 heads and wicked cam and 4000TC.
Also, now, building the engine for torque,means you don't necessarily need an OD, she will be quite happy to pull those 3.55s to 65mph at a tic over 3000 with those little tires.
Also now, the A833od is back on the table. A torquey 360 will pull those gear splits easily enough.And the 1.67second gear with the the 3.55s will get you 38mph@3000, not ideal for autocrossing with a teener, but doable with a 360. With the A999, 38 would be about 2900 in second.
>So this is actually shaping up to be a 3.73 geared car with the od box. This will get you 6056@123mph in direct, 2336@65 in od, and 3125@38mph in second, AND, an 11.53 starter gear. Yeah this is coming together nicely.
So now, easy on the cam.
The starter gear of 11.53 is plenty of take-off gear. The 2336 cruiser gear will allow up to a 230@050 gear, but the 38mph at 3125 will want a smaller cam, like maybe 215/220@050. The nitrous motor will be alright in this range.
I think, based on my experience with a Hughes HE2430 cam which was 223/230/110, this might be your ideal size in a roller motor. This cam had tons of torque. It would lite up 245s up to 50mph(4200rpm) with a gear ratio of 6.78 x .89tire=6.03 normalized, with just a stomp on the little pedal.That combo went 12.9@106; which is a 10.4 P/W or 351 hp @3650race-weight, close enough,I'd say.
>This was just a basic build,zero deck, with OOTB Eddies, That HE2430, and 1.6 arms for a lift of .549/.571 IIRC.Compression came in at 10.9Scr. I used a 750DP on an AG, TTIs and full length dual 3" exhaust.I shifted that beast at 7000rpm, probably 1000/1200rpm past where it would have liked to be shifted at. I only ever made the one pass. 12s were good enough for me.I was running the 3.55s and a 2.66low box, trapping at the top of third gear.
>Of the three cams my engine has seen, this 2430 was my favorite. The current cam is only 1 size bigger, yet it is a world away from that 2430.

>I gotta remind you tho,that I am now running the 3.09/direct box with a GVOD behind it.And still the 3.55s. This combo is far superior to the od box. It would get you
6300@123 in 3-od, or 5764 in direct. 38mph would be 3400 in second/4300 in first-over. And 65 would be 2376.
The neat thing about the GVOD, is you can set it up to be used as a splitter. This gives you the following ratios; 3.09-2.41-1.91-1.49---1.40-1.09-1.00-.78od GV in red
These can be used in the following ways;
for 1/8 mile I shift 3.09-s2.41-1.91. Splits are all about .78
for the qtr, I shift 3.09-s2.41-1.91-s1.49.Again the splits are all about .78
as a steeter I shift the box;3.09-1.91-1.40-s1.09-.78od.Sometimes I split 1-2 if I'm showing off. First-over gets me 60@6377, a two ratio blast.
To go 123, I would shift 3.09-2.41-1.91-1.40-s1.09,hitting 6350 with 3.91s or
I would shift 3.09-1.91-1.40-1.00 and hit 6060 with 3.73s
So you can see how versatile this combo is.
Because splitting has such tight rpm drops I think I would someday like to try a cam with a tighter LSA; say a 104*, and go back to a fast-rate 268/272cam. Shifting at 6200say, the .78 split drags the Rs down to 4836, for a powerband requirement of just 1364. This would generate some serious average hp.
> the splitter also works very nicely with the od box. The ratios are
3.09-2.41-1.67-1.30-1.00-.78-.57, all 7 useable ratios. You can use any rear gear you want to, to optimize either the trap rpm or the launch.
I went away from this combo with the current 230 cam, cuz it was not happy with the standard splits. I found that I always had to split, and the way the splitter works, I just got tired of it.
The splitter works GREAT under dragracing conditions,shifting like lightning. And it works great, using it the way it was intended to be used.
But HAVING to split it was a pain. At low driveshaft speeds, the shift does not come instantly. So you always have to anticipate the shift on the clutch, cuz when the shift comes, it is BAM! The faster you go, the shorter the lagtime. I almost cursed that 230 cam for being so lazy on the bottom. With 4.30s the driveshaft speed was higher and the lagtime was better. But 4.30s and a 3.09 low is a crazy 13.29 starter gear, and that got to be too much to bear. Either the 230* cam had to go, or the tranny. I chose to ditch the tranny.
The HE2430 pulled that combo pretty nice. I did not have to split gears all the time. It pulled those splits ok.
I gotta say tho that double od is pretty cool. They would turn 3.73s into 2.12s,dropping the direct Rs at 65mph,from 3200(with your tires) to 1822.