yea they did

Offset mounts Hold the engine forward, which has a few benefits.

Better oil pickup during drag racing
Removes vibration caused from lowering the car
Better axle alignment for less HP loss through the shafts
Increased weight on the front tires for better launching
Added clearance to sway bar for header and downpipe installs

im bout to pick them up

since you think it makes it stiffer does the shifting improve do you know