Steve , I agree,I normally put it on ramps,then jack it from there-1 side at a time-saves a lot of effort.Also agree about rusty studs-leaving it until next service means killing 2 birds with 1 heat exchangers but I fancied replacing sooner then I could repair the flanges & any other little brackets etc & sell the old one repaired to recoup some money.Although I have a large garage,the large bit is full of an MGB under restoration & you get so much more light outside-trouble is-if I get stuck on the 964,then unless the 924S is left outside as well,my wifes backup car would be trapped in the garage-so more ramblings & hesitation but fancy having a go at the heat exchanger. Cheers, Colin.