Hey there, I did something similiar, I converted my EQ8E into a Backdraft 8e. Wasnt too hard. Just had to buy the parts needed to change it over.

In your case, you will the body mounts, front and read bumpers, body and wheels/tires.

As far as the spur pinion set up. I went to the 46t/15t set up for mine since I made it a backdraft.

I belive this affects performance and speed.

Keep us posted.