I'm putting together my "to do" list for my newly acquired 72 Spider and sorting out what I'll do vs what I'll pay to have done. The car has Dellorto 45s and the blocks between the carbs and intake manifolds (isolators?) are cracked. First question is, since this is not the original set up on the car, how can I be sure I get the right parts, and second, can I do the replacement without messing up carb settings that I'll have to re-do? Any other secret gaskets/seals that need to be replaced at the same time, like a gasket on either side of the isolators? (I hate it when I tear into something, only to find that something else needs to be replaced, which delays completion) I'll probably replace fuel lines at the same time, since some look cracked too. I imagine that the cracks on the isolators may be messing up the mixture by admitting air, so some re-tuning may be required.