Scooper, Yes, 55cm from center bb to center of toptube (top to bottom length) and im assuming the 54cm is the reach? heres the frame i was looking at.

http://www.ebay.com/itm/VINTAGE-ZEUS...item2c7028c626

Im 5'10/5'11. 32 inseam.

no? stick with 56? Is it easy to find 1'' threadless steel forks?