I'm thinking about switching some old dia-compe sidepulls to centerpull. I really am looking for more power, but i don't want to spend the money for new dual pivots and aero levers just yet. That and I may want to keep my bike period-correct.

Is there any stopping difference with centerpulls than sidepulls? Nowadays these are both old and dual pivots are the only thing in bike shops, but I thought i'd ask anyway.