Toilet Upgrade Question

[wmyers]

Hi All,
I'm new here. We just purchased our 2018 Passport 2920BH.
We would like to upgrade the toilet to ceramic one. We're looking at the Dometic 310 or 320.
Their install guides say you need 10" (310) or 11" (320) from the rear wall to the center of the drain.
It looks like the existing pipe is 8" from the wall to the center of the drain.

Has anyone had any experience with a Passport and making this toilet fit?
Can it be done? Am I missing something simple?

Thanks!
Wynn

[skikrazee]

I don't have a passport, but when I swapped mine for a 320 I had to change the angle it sat at due to the wall being too close. It didn't look out of place because i pointed it towards the vanity. Also the 320 has a more elongated bowl.

[wmyers]

I've discovered that the unit came with a Dometic 300 toilet installed. Of course, it's the cheap one.

The space is just too tight to be able to rotate the toilet.

So at this point, I'm thinking it will be impossible to upgrade to the 310 or 320 since the rough in hole has to be 2-3 inches farther out from the wall.