Blaster New steering spindle and hole size

So i am starting my surf hull and i am going to build a new steering stem and i am out of town. does anyone know what size the hole on the hood is that the steering goes through? also, if this works out, would anyone be interested in a steering assembly that is all alluminum and stainless with ball bearings? just trying to get a feeler. will probably be 200-250 when its all said and done.
Thanks guys
 
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