2017 KTM 450/2014 Timbersled Snow cross install guestion!

[yooper 8]

We are trying to install a 2014 timbersled snow cross kit on a 2017 KTM 450 SXF and are wondering if you have to completely remove the air box and plastic shroud behind it, or if you need to modify or cut the plastic? Any ideas or tips would be appreciated! Thanks!
Also wondering what battery will fit this bike? Stock lithium-ion battery is tiny...3-1/2 x 2 x 3-1/2 tall....what would you recommend for a good reliable battery that would fit?
Thanks!

 

[Sickness]

From the instructions
30. SXF-KTM air box mod: On this model bike the air box is also the side panels. This will need to be modified by cutting the entire inside air box section out in order for the SX Mountain Horse shock and strut rod to fit through it. This is not a hard job with the proper tools. Use a Dremel tool with Roto-Zip cutting blade to cut the plastic free hand.

Some people don't use the airbox at all, but without the right side number plate you may burn your pants on the exhaust. Wrap it

 

[yooper 8]

Thank you!