Brushes are identical between both starter motors. Since the 430 starter has the components rotated inside it is important you keep the 430 housing with the same 430 brush holder plate in the rear. They are keyed to align together before the long bolts go in.
Assembly should not be difficult or frustrating. BTW, I seriously doubt any of the housing parts are new because Ford used them since the 1940s. The reason the housing is so heavy is because it actually conducts magnetism through the shoes (beginning at the field windings).
As a side note, look at the brush holders. Two are riveted to the back plate with insulators. The other two are riveted directly to the back plate with no insulators. This is correct. If you need to change a brush holder, simply drill the old rivets out and replace with a good one. If it had insulators, be sure to put them back in. You can use rivets or small screws & nuts but they must be tight. - Dave
Assembly should not be difficult or frustrating. BTW, I seriously doubt any of the housing parts are new because Ford used them since the 1940s. The reason the housing is so heavy is because it actually conducts magnetism through the shoes (beginning at the field windings).
As a side note, look at the brush holders. Two are riveted to the back plate with insulators. The other two are riveted directly to the back plate with no insulators. This is correct. If you need to change a brush holder, simply drill the old rivets out and replace with a good one. If it had insulators, be sure to put them back in. You can use rivets or small screws & nuts but they must be tight. - Dave
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