LCL6048 in Carisma
 

Hope you can help, been racing 1/10th 2wd for a few years and my lad had a GT14b for Xmas. It was supplied new with a LCL6048 motor. Is this motor Ok to run in it, it seems it doesn't fit unless I enlarge the holds in the motor mount.
If that's what I need to do, what pinion and will it be the same sort a I run in 1/10th (pitch and diameter) ?

Thanks