If you rotate just the carb and not the reed and insulator block you will need a longer length of tube to make the distance between nipples without kinking the pulse line and more risk of splitting gaskets.Not a problem if you have spares.Chances are if careful,you will be able to separate carb/reed and insulator block as one from case without splitting gaskets and maybe even save the gasket from insulator block to case without damage.looks neater if kept with pulse line as is anyway.You could turn the pulse nipple on carb for a straight run if turning carb only,still requires a longer pulse line though and adds up to more work/time.