gulp-less is already included in our gulpfile, so technically you don’t have to do anything to get less compiling.
To get it compiling in the right place, change the manifest.json to grab main.less instead of main.scss and change all the Sass files over to Less files and change everything to Less code. Or just start with a blank main.less file. (don’t forget to add the wiredep block back in)
Let me know if you have further questions. I’d put up a fork but it’s a pain keeping it maintained and I don’t want people downloading old versions.
BTW - I was a huge fan of Less. Took me about 2 weeks to get use to Sass and I see no point in using Less now that
libsass is a thing, there’s just more stuff written in Sass.