Ok, swapping a 3/4 ton 14bolt FF into my 89 Blazer. The rear end came off of a 77 pickup with a 2-3" lift (blocks). I notice the spring perches have dowels in them and the old blocks have a hole in the center for the dowels and the centering bolt on the springs. Were these dowels driven in when the old lift was originally done or did they come from the factory like that? I'm doing a shackle flip in the rear and wanted to mount the rear end directly to the spring w/o any blocks to minimize axle wrap. Any recommendations on how to get them out or is cutting and drilling my only option? ...or should I get some short blocks to make it work (might sit too high in the back)?