2.66 low gear vs close ratio

I thought that almost all A-body A-833's other than the OD's and some early ones were 2.66:1 first. I'm running a 2.66:1 first trans with a 340 with a 227/231 Hydraulic roller and 3.23's. 25.6" tall tires. Maybe I could use a slightly deeper first gear to be totally optimized for launching, but otherwise it's fabulous.