Yes, it is *almost* long enough, but not quite. Or you could
skip the first and last TRs of TENT, since you might expect
them to be zero anyway. But if you are using an 8 second
stimulus, then there is probably little reason to use TENTs.
So it would probably be enough to go with:
... -stim_times_IM timing.txt 'BLOCK(8,1)' ...
For a little background, consider reading a little from
afni07_advanced.pdf starting at slide #9.
- rick