when i do head jobs on these, i wire up the coils first, install them while only the lower intake plenum is bolted on. here's the thing - there are 4 screws that hold the coils on. 2 in the back (lower manifold) and 2 toward the front which are just a little higher (attaching to the upper intake manifold. so while you can see everything, mount the coil packs with plug wires installed properly, but only install the back 2 screws, and leave them loose. just catch a few threads if you read me. the other 2 screws fasten the packs to the uppper manifold which obviously isn't on yet. you leave the back screws loose so you can tilt the coil assembly back so you can install the upper plenum. granted, it's no walk in the park, but you can run in the last two screws if you can kneel or belly flop on top of the engine and peer down and you can barely see the holes. it's 1/4 inch extension time with maybe a magnetic socket. i find this the worst part of the whole job, but once you get the hang of it, you get wiser.
