spacer wont get me anymore shroud clearance...... but i'm just guessing on clearance too, i dont have the tranny hooked up yet so the blades are touching the bottom of the shroud right now, i've got probably a little more than a quarter inch clearance at top though..... maybe i should get a fan thats another inch shorter.... i can always but a brand new one, they're not too expensive.... i just didn't like the old 4 solid blade fan that was stock on the car, really didn't look like it was too efficient