hi everybody!
new here, new to fixies, (and bike work in general) but i was wondering:

i have a late 70's (?) fuji that i want to convert to a fixie, and i have the hole rear wheel set-up, but
do i need to get a new crank or can i convert the ten-speed crank?
can i use a bmx crank and add clipless pedals??!?!

sorry if this is repost

edit: i probably will want to replace it anyway, as the pedal clearance is way too little, but still, i would like any input