are you starting with a manual trans car? the auto to manual swap is lots and lots of work to do correctly. 5mt to 6mt is straight forward, as long as you have all the parts there.
be an awesome swap if you can get them for a good price. the Spec B does have some parts that are unique to the Spec B. personally i'd swap as much as from the Spec B as possible, except the rear springs. grab some LGT wagon rear springs, then you don't need the strut spacers for the rear.