tips on changing exhaust manifolds?

[67cst]

hey guys tomorrow i am taking my pass side ramhorn off, the one on there now is all cracked and leaking bad, last night i saw blue flames shooting out! nuked a brand new plug wire. anyways is it going to be a bit ch swapping ramhorns? i got another set in good shape so ill just have to bolt the one on. is there a good order in doing things? i think ill attack those bottom 3 bolts first so the whole manifold isnt putting its weight on the pipe. any help appreciated.

thanks

Derek