I'd be careful with trying to install bucksweep. I ran it with 10-11 yo and with our 8th grade team. I ditched it with both teams. Neither could pull it off. Teaching the pulling was the least of my issues. Very easy. The problems occurred as teams kept slamming the A gaps. Timing would get disrupted. Pullers couldn't get out. It became a nightmare. Now, I have pulled very successfully from shotgun, like Auburn's B/S, just not under center.
Then you have a field day running Belly and Belly Down.  No one ever said it is easy.  That is why we work as coaches to make it work.  I know coaches running it with their Mighty-Mites and they are getting it done.  They coach their read ends off.  It is easy to just ditch it and say the kids can't pull it off.

If you want to run sweep, I would move the WB out so he can crack the DE. We always have DEs that are lined up outside the WB and a CB further out, so there are two defenders on the edge. Have the FB go for the widest defender, the CB. Have the PST and TE block G-D-B. The PSG pulls outside and turns up. Everyone else just reaches to secure their gap. Seems to work better.
Not a problem to block.  Wing's rule is to block the first free defender inside on the LOS.  With the DE outside the Wing then they are either running a 6 man front or a very foolish 5 man front.  So, the Wing blocks down on the DT.  The playside guard kicks out the DE, the backside guard seals up inside the hole and the backside tackle gets that pesky CB.  If that is the defense you would be facing then you would simply run 122/928 Gut which simply changes the responsibilities on of the guards.  Honestly, you give me that front then I am running 983/187 all day.  Easy blocking just by alignment.

For belly, I would also move the SE to a TE if you play a lot of 60 fronts. With a SE you will be outmanned on the edge. Having a TE allows you to block G-D-B with the PST and TE(X), and the PSG will be able to kick out the DE and HB to LBer.

I want tape!