My Allez Double Steel has a Shimano 2300 crankset with 52/39T chain rings. I would like to upgrade to a Shimano Ultegra FC-6500 39/53T mainly because it looks a lot cooler, and perhaps could save a little weight. I have a few (possibly dumb) questions:

1. What exact type of Octalink bottom bracket will I need to buy (thread type and shaft length?)

2. As the large chain ring has one extra tooth, will I need to move the forward derailleur up to make room?

3. What type of crank puller and bottom bracket tool/s will I need?

4. Will there be any issues with alignment between the new chain rings and the 8 speed cassette that I might need to deal with?

Thanks!

Dale