Is it ok reuse the stock spring plates off my front corp 10? I have 3 of the u bolts and nuts I need, but one fell out during shipping, so where can I get another one (one of the longer ones is missing)? What size are the front and rear spring eye bolts? will I need washers for the spring eyes? Does anybody know the extended and compressed length shock I will need for 4" RC springs with 1" zero rates, not moving the axle foward and using ford shock towers?