I think you will be okay----before you buy the toilet---measure up the model that you desire---most brands have enough 'wiggle room' for your opening---
:laughing: knowledge and home depot!:laughing::laughing::no:Go to home depot and ask for a toilet that will work- then have the salesperson line up the toilets against the wall and measure them. This will serve two purposes- You will find the toilet that works for your dimensions and the salesperson will now have gained a little knowledge about plumbing :thumbup: