On the F250 SD with the 5.4L is the engine pushed more upfront or more towards the rear?

Just wondering. Looking at getting one for myself with this engine. I was thinking about getting around a 2003 model with the 5.4L or the 6.8L v10 but after looking at forums people complain that the V10 is pushed under the cowl making routine maintenance a pain and would have to send the truck into the dealer or a mechanic to lift the cab just to either replace the heads, injectors, coil packs, spark plugs. I like the 5.4L, my dad's 1999 F150 has one but we have the same problem like the F250 and F350 with the V10 with the back 2 plugs are under the cowl and are a P.I.T.A to work on.

I would consider the 6.0L PSD or a 2003 7.3L (2003 was the final production year of the 7.3L and mid way through that production year Ford with International introduced the 6.0L thus starting all the major PSD problems to the 6.4L) but those have to have the cab lifted off to work on them. The 5.4L even though I feel it is under powered in the F150 and will be for sure in the F250 SD but it will suffice for my needs (plowing and towing a 20' boat). I don't care about MPG with it since its a large truck and best with 4x4 on it will be about 15mpg at around 55 mph.

Any recommendations for a snowplow (straight plow not a v-plow) and complete assembly any brands that are great and ones to stay away from.