As was said below, you can get at one clamp between two of the intake manifold runners. The other is behind the head. Both are awkward to reach. You can make the job easier by laying a piece of plywood across the fenders and then you can lay on it to reach these clamps more comfortably.

When you slit the hoses to loosen them, be very careful you don't cut into the pipe nipples. This may create a leak problem.