Peter - You're correct, I didn't remove the intake manifolds. Most time spent on an individual OEM component was the metal fuel line that is placed atop the cooling air shroud and beneath the intake system. This has to be cut to be removed and I found that the hand grinder with cut-off wheel makes quick work of this. As shown in the photo, I first cut the rubber lines that feed the fuel rails then cut the metal line right at the "T", which is easily accessible. After removing the fastener at the regulator end, the line is easily withdrawn by moving it towards the firewall and rotating it as you go. Hate to admit it, but I wasted lots of time trying to remove this without cutting it up.
I did a top-end overhaul on my engine in 2011 so really didn't need to replace anything other than fuel lines. Wish I had done the line replacement when engine was out of the car - would have been a cake-walk.