I have a question noman bhai. The weld you do for extension , is it strong enough to take up all the beating a 4x4 is upto? How do you make it solid enough? Do you put in some nut bolts apart from welding?
Most of the commercial 4x4s running in whole North are cut, extended and welded. You will hardly find a short wheel base commercial 4x4 in Kaghan, Kashmir, Gilgit Baltistan etc (Sawat has different story due to NCP vehicles). They get auctioned vehicle, cut, extend and weld and you see all such vehicles performing great in rough and challenging terrain of North. These vehicles go daily to Paye, Lalazar, Ratti Gali, Babboon top, Shounter, Minimarg etc. And these are for tourists. While the loader 4x4s which runs for locals get a lot more beating than tourists vehicles.
1. They carry more than 20 people sometimes (not exaggerating, have traveled several times in such 4x4s) + luggage (ghee k kanaster, aate ki bori, murghiyan, bakra or anything you can imagine).
2. These vehicles run on even tougher tracks which are built to join remote villages, not for common tourists attractions.
So point is, electric welding is quite strong, strong enough to take all such beating. My two cents, rest Noman bhai will explain better.