2.66 low gear vs close ratio

vntd
Your engine is a lot like mine.And I also run 3.55s. If you don't already have a tranny, then I very highly recommend the 3.09low/Direct 4th box. And I also urge you not to use the OD box.
I've tried em all with my 230* equipped 367 cuber. The power band of that 230/110 is as broad and flat as Texas?, So it does well with the ratios in the standard 2.66box. The 3.09 just gives it a real kick off the line. And you don't need to slip it out. Once you get the tune into it,it will be;just blip the throttle and dump it.
The 3.09 takes off with 3.55s, like the 2.66 takes off with 4.10s.And it allows a short shift into 2nd. Or not.