I ordered Belltech spindles and 1" coils, planning on using 4" blocks for the rear. I've read that with just 1" coils, I don't need new shocks, but will I in the rear with the 4" blocks? Also, does brand on blocks matter? Belltech doesn't make a 4" block, I know AIM does, but I've heard horror stories about them. Who makes good 4" blocks? Thanks.