Help With Bottom bracket and crankset
 

I have a frame who has a bb68 i think measured the lenght beneath the frame. I have a fsa gossamer pro evo 386 what do i have to do to make it fit my frame? Are there any ways or should i just buy 105 5800 crankset

This is what you need the chart is right here in the document section. If I understand you have a standard thread BB. If it were me though I would sell the FSA crank and go Shimano 105. Shimano 105 and up in my estimation with shimano drivetrain shifts the best and smoothest. https://shop.fullspeedahead.com/en/type/cranksets