You've two options for timing mount.
Incase if you use n16 timing mount, you've to do a hole in body on timing side.
But i used the b12 three bolt bracket and made a extension, nicely so on that extension you can hook the rubber mount.
And for particularly RS5F70A you've to get a triangular bracket that comes under the battery.
And for rear bracket you need to drill an extra hole in rear b12 bracket.