1 - That would be a 25mm change per side which would look odd and might invlove touching the shocks at the rear.
2 - I have 5x10 GB wheels with offset 14 and they're just inside the arches at the front - helped by some negative camber. I'm using 19mm spacers at the back on standard drums with longer studs and again they're just inside the arches - again with negative camber. The rears would be ok with proper 25mm spaced drums but the 6mm difference is unnoticable.
3 - nope, no obvious error there - those wheels just need wider arches.
Hi, i dont suppose you have any pics with your GB wheels setup?, i can't find any 5x10 wheels with standard special arches?
I'm heading towards the minilites which has a offset of ET12, not the best but better
thanks