It is not quite that easy. The 430 requires a frame extension and a blade with a wider mount. The 318 blade won't fit a 430 without widening the frame on the blade and if you do that it won't go back on your 318.
Click on one our sponsors (ref: AlZWelding.com) above..........Al sells what he calls a "frame squeezer" that will allow use of the 300 Series blades to be mounted onto a 430.......Hope this helps..........Gary
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