g'day,
wot i have done previous in short.. is strip everything out before you cut anything out, welding BRACE's to the car with tube steel, then start with floor structure , ie inner sills/ bottoms of front pillars / any floor braces....ALWAYS checking the shells alignment, on of the last things i do is .. i would tack weld the outer sills on, refit door shells for getting correct gap/fit for the sills ....its a big job, but take your time, wear ALL SAFTEY GEAR....maybe go to nite tafe school, to get info etc... remmber this is a big job, and should be done correctly, and in the end its no shame if you feel you cannot do it correctly to get someone with more expierence to do this job....hey i got people to help me out before , i did all the labourous stuff .in the end wot you want is a great result.
mr c