67 Cuda 273 to 340, 360 engine mounts.

Does that apply to both sides? Are they strong enough to hold 525 hp with gears and traction when this is done to them. Thank you for your time and help.
Passenger side is identical to the 340 mount, only the driver's side needs the spacer.
As far as strength, they're just as strong as the factory 340 mounts you're looking for.