I just picked up a -12 setrab 19 row cooler. I could just get an adapter to convert the -12 to -10. but are there any downfalls you guys can see with running -12? Like oil pressure drops?

 

I don't know about pressure drops, but one concern might be trying to fit the -12AN adapters at the sandwich plate. The -10AN adapters on my Mugen sandwich plate were pretty large as it was. If it was me, I'd probably use a reducer at the cooler and run -10AN or even -8AN lines to the sandwich plate.