how many of you guys are running a solid motor mount on the driverside and what horsepower do you recommend them at what are the disadvantages

I dont run solid but I do run polys, no disadvantage that I know of. Big advantage is not breaking the mount, stock driver side mounts dont live long for me with a heavy right foot, interlocking or not. If I buy a car with stock mounts it gets a chain on the drivers side of the block until the mounts get swapped.