I have purchased a set of 2nd hand MGF 15in wheels. Currently I have Marina wheels but the wheel nuts are too small for the MGF wheels. I had a look on the Midland Wheels web site and there are various nuts to buy but which thread type do I need and I should I have tapered wheel nuts or sleeves?
I remember reading a thread not too long ago (can't find it now) with someone saying they had replaced the wheel studs with Montego studs and used these wheel nuts - are these better and would I have to drill out the holes in the hubs to take these studs?
I had a look at an MGF in tesco's car park and it seemed to have tapered wheel nuts and the owner wasn't too keen on letting me undo one to have a good look. You's think nobody had asked to look at their nuts before

Also the wheels came with good tyres but two are 205 and two are 185 are these likely to be too wide for a standard minor wheel arch?
Anyway hope someone can help? Jeff