I'm planning to change my oil pan gasket in the future and knocking out the dents in my oil pan and repainting it so it can look pretty.

The only problem is do you think its gonna be possible to do if I can't loosen the crossmember, looks to be welded on.
BTW, whats the best way to change the motor mounts. Is an engine hoist needed or can jacks be put under the transmission? Thanks.