Some hex bit sockets have replaceable (and therefore, removeable) bits. They are typically 5/16" on the socket end. They work if you pull them out of the socket. Or you might find replacement bits at a hardware store.

That would be perfect for the 3/4" section. But, you still need the 4" section. Using the standard wrench is difficult because the 1" section gets in the way of the power steering gear.

I used bit sockets on an extension bar for the bolts that were not obstructed by the steeering gear box.

I couldn't get a ratchet on the end of the bar due to the gear.........didn't want to risk the universal with the small hex bits.