Re: Forced perspective, painted backdrops and the refit Enterprise
Or, you could relocate the main engine room level one deck below (I doubt that the upper level could possibly fit in the forward bow) and simply extend the length of the Y-split tubes before they reach the warp nacelles.
On the original set these were quite asymetrical. Theoretically these y-split extensions could also be power lines for the aft phaser port and starboard. I don't think it makes a lot of functional sense to have that much empty space extending on the FP painting beyond the Y-split.
"The first duty of every Starfleet officer is to the truth" Jean-Luc Picard
"We can't solve problems by using the same kind of thinking we used when we created them." Albert Einstein