FWIW I almost exclusively use my craftsman long pivot head ratchet. For those bolts add on the deep 13mm socket and maybe a 3" extension if working from the top. From the side, short ratched, lots of hand strength and the 13mm deep socket, maybe even unbolt the ps pump and hold it up higher with a bungee.
Yeah.. I'd have been on the road Friday night, (it blew Thurs night, Friday I picked up the motor at noon) except I needed an NA fuel rail to finish the conversion from SC to NA.