If you want to put your Motor in the front of your RC scale car take a look. No need to buy in aluminium if you can simply print it.
I added a picture of the previous 2 gear version to show how to mount it in the rails. As you can see i flipped the design for the weight of the motor to come deeper.
Hint: With no modification it might not fit the standard SCX10 rails.
Motor is down. Spur Gear is somewhat high and might get in touch with the hood of your rig.
Motor is more up and the Spur Gear faces down. So it is not that high than Version 1 Size is the same. I gave it just a little bit different shape :-)
I made new files for SCX10 Rails with two different ways to mount (stock shock towers and the towers I made). Here you can find the new front motor mount for the SCX10 frame. https://www.thingiverse.com/thing:3047387
Looking for a way to mount my Motor to the front of my rig (Jeep JK) I developed this part.
First I tried a version with a two gear transfer box but i failed because of the missing space with the needed servo to change gears. This is why I went back to the standard SCX10 I Gearbox.
Pics are with Standard 540 Motor.
Gearbox is mounted with M3x25mm, maybe M3x30mm gives you more space for the nuts
Wide approx. 72mm
I included a Fusion 360 File for easy rebuilds.