I guess it's down to personal preference, sorry but I'm not being rude however if I'm spending a shed load of money and time on building a car then I'll fit what I like, which may not be to everyone's taste, which is fair enough.
If you google the Le Man 1961 no.14 car with the blue stripe the tyre walls are huge, this is the look I want. However I did spend a lot of time making sure these tyres are W rated as the ones on the car were this rating. I've got a massive issue with speedo calibration with this set up though, thinking of ways around that currently. As have 17% difference. 3.0 engine should have enough power to cater for difference, I think if I had a 1.9 it would struggle possibly. It looks like the easiest solution is to change the speedo gauge numbering format to a z3m set which pretty much matches the setup change, but I need to do more research and will be going over a previous change already as I have swapped to cream gauges already.