1/4" shouldn't be a problem at all, but I can't say 100% for certain without trying it. If anything though, you would first run into clearance issues on the drivers side of the throttle body, coming into contact with the line on the side of the brake fluid reservoir. A small little tweak to that line would clear up any space you might need.
All other clearances would be fine when adding the spacer.
All other clearances would be fine when adding the spacer.