i need help big time

my 2.0 cu runs like a bag of bolts, the garage i took it to ( wooleys, norfolk ) said it's the carbs that are wrong weber 32/36's
after readig loads of threads i'm still none the wiser, some say carbs good, some say carbs bad !
is there anything i can do / anyone that can sort these out cos they were lots of pennys.
PLEASE HELP NOT ONLY TO SAVE MY BUS, BUT TO SAVE YOUR SOUL !!