Neil Wheadon wrote:How are you acclimatising to the altitude?
Leh - 18875 Foot
Menali - 13050 foot
Chandigarh - 1066foot
Yes it's downhill on this trip, but most tours go the other way
It's a fair point but the altitudes you cite are not of those places. I normally cite altitudes in metres, but here goes.
13,051 ft is the height of the Rohtang Pass, which Manali lies at the foot of. Manali itself is about 6,000 ft.
18,379 ft is the incorrect height shown on a sign on the Khardung La, whose actual height is 17,582. The Khardung La is not on the Leh-Manali highway, rather it lies to the north of Leh on the way to the Nubra Valley, and therefore is distinctly optional, though probably worthwhile if you actually go over to Nubra and are acclimatised to get over it.
Leh itself is at about 11,500 ft, and the highest pass on the Leh-Manali is the Tanglang La at 17,480 (again there is an incorrect claim of, maybe not coincidentally, 17,582 on a sign on the pass). They do like exaggerating the height of their passes. There's a website somewhere that documents falsely claimed mountain and pass heights.
Nevertheless, there is a requirement for acclimatisation and as OP is planning to go for 6 weeks I rather presume he must have some additional plans to facilitate that. I've always wanted to go to Zanskar.