It would be wise to have aleast metric impacts, and 3/8 drive 6 point metric deep sockets at minimum for working on the isuzu nothing else is really special about them that common metric tools won't fit. You might need a few big sizes for pinion nuts, torision bar bolts and driveshaft flanges (27-33mm) but the rest are small.If you search under 4.3 and my username you can see some pics I took when I did my throttle body swap. Good luck.

CHRIS
98 Amigo, 92 Pup

need a pickup 1st gen fuel level sender