Lipos for YZ10

[sldmodels]

I'm looking at running my old YZ10 at Ardent's vintage event(s), and am planning on using lipos in it. Now I know that it used to use saddle packs, and I've no problem with that, but really don't want to shell out too much cash getting even more lipos, so am considering using my 7.4v tc lipos, or even my micro 1800 liops (nosram). I think either should be possible, but any helpfull advice would be appreciated.