Quark's chests have very nice custom textures. The vanilla oak chest is pretty out of place next to oak wood, but I personally love the texture.

I'd like to request a 1-1 shapeless recipe for converting oak chests from Charset into oak chests from vanilla. If Quark is detected, a similar recipe would be added for the other 5.

Adding a source for the vanilla oak chest is important because some mods don't support the ore dictionary for chests. This makes some items inaccessible unless the pack developer fixes those recipes.

You can not only do this yourself, but also why would you have BOTH chest sets going?
Just disable Quark's chests, theres no need to have both.

Did you even read his comment?

Quark's chests have very nice custom textures. The vanilla oak chest is pretty out of place next to oak wood, but I personally love the texture.

Anyhow.

Adding a source for the vanilla oak chest is important because some mods don't support the ore dictionary for chests.

No. That is not an issue with Charset chests for the most part (at least within the regular crafting table).

As for the rest, unlikely - I've pretty much ditched 1.12 mod dev. Sorry.