Here you go. 275/60-15 drag radials, 4.10 gears, '71-'74 23 spline transmission with 2.44:1 1st, 1.77:1 2nd, 1.34:1 3rd, Direct 4th.
Here's your 3000 rpm shift graph:
View attachment 1715540285
And here's your 6500 rpm shift graph:
View attachment 1715540287