Re: Easing around
With a 3.73 rear gear you should not have trouble starting off without having to "rev it up and pop the clutch". Yes, it is correct, that with the clutch fully engaged, yoou have to be going at least 5 - 10 mph. IIRC, T10 used any number of first gear ratios from 2.43 to 3.4x or something. Do you have any idea what your first gear ratio is?
My 69 with a 70 spec LT-1, high rise and DZ holley carb, 4.10 rear and M20 trans will take off without even touching the gas if I let the clutch our easy. I realize those are different numbers than you have (well, maybe the same overall ratio depending on your first gear.)
Would be nice to get more info.
1st gear ratio?
what kind of clutch? Not just the brand, is it a diaphram type? They tend to be much easier to ease into.
As Dave suggested, what is your initial timing at? How is vac advance (if you have one) hooked up? Manifold or ported?
And, the carb and intake COULD be a factor.
Give us some more info, and I bet someone will have experienced something similar.