The minute you withdraw funds from your 457(b), you'll have to pay taxes on it. It doesn't matter what you do or plan to do with the money. Unless you absolutely need the money from your 457(b), I wouldn't touch it until you are ready to retire.
2004 BMW M3 6MT - B&B TriFlow section 3|AP V2 headers|AST 4200|UUC EVO3 SSK with DSSR|ZHP knob|Orion V4|Matte Black kidney/side grills|19" VMR CSL reps|245/275 Continental ExtremeContact DW|Track stuff: 9" square style 67|275/35/18 Nitto NT01|Schroth Quick Fits|PFC 08 & 01 Pads
2014 VW GLI 6MT - APR stage 1 tune|CTS Turbo intake & 3" downpipe|ST coilovers