Wheel size help please

Hi All, I am a newbie here and I have already found this to be a great resource - so thank you!
I am replacing my stock wheels on my R27 and wanted to check on size. I have put KTR 19mm spacers on (as per my build thread) and wanted to know if I keep the spacers, how will 17x7 bET40 5x108 wheels fit in terms of the width versus the wheel arches. I know there is a Driftworks sponsored app, however I wanted to get it from the pros on here - Im happy to have the arches rolled if needs. Thanks Darren
 
The wheels will stick out of the arches with the spacers on I should think, especially at the front.

This is mine on 17x7J ET41 rims, albeit with 205 tyres:

IMG_20200328_165307.jpgIMG_20200328_165313.jpgIMG_20200328_165245.jpg
 
Offset of the stock wheels is ET68, so your new wheels will be like your current wheels but with 28mm spacers.

I highly doubt you will want to run any additional spacers with your new setup.
 
Thank you both, I will reduce the offset on the wheels I buy then or sell the spacers and new bolts with the old wheels