Need help isuzu gurus,

Was planning on upgrading mags on my 1st gen xtrm (ie. 1st hilander extreme body). Big problem that the 1st gen body only has 4 holes for the wheels, whereas the succeeding generations have 6 holes. Unfortunately the mags i have in mind are 18" with six holes.

a.)Is it possible to swap my xtrm's wheel assembly to that of a current gen or maybe a bighorn wheel assembly to obtain the 6 studs for the wheels?

b.)If yes, would it be bolt-on, no modifications needed?

c.)Would the change to 18" drastically affect this auv's performance? Speed for sure will be affected.

Also, any known suki surplus places for such parts?

Remember though, this was the 1st generation xtreme. 1st hilander body with xtrme kit, 2.5 ltr non-turbo, lifted suspension, 15", 4 hole mags.

Any info would be appreciated.