We did it with our wishbone FB on our 5-7 team.
On sweeps and bootlegs, we sent the lead HB to the contain guy (DE/LB), because he had a better angle then the FB (we wanted an upfield block, not a kickout) and sent the FB to the CB.
The HB had to get out fast so he wasn't in the way of the FB. The FB had to basically skip step to replace the HB (we definitely didn't want him cutting in front of the HB) and do it fast to stay out of the way of the trailing HB or the hand-off (depending on whether it was a sweep or a bootleg). Then the FB took off for the CB.
The little dudes picked it up pretty fast. And the FB always moved really fast, because the alternative was getting run over.
However, I have no idea how the speed compared to a regular pull, because I've never pulled anybody.