ok, I'm finally trying to stuff the 454 into the K5...but when I went to bolt the motor mounts onto the block...it hits the front header tube on the driver side, so I can't get it on all the way. it seems like it's not hitting by much. it's right on the corner of the mount. would it be ok to grind a little off the mount to make it clear, or will this weaken it, and make it unsafe? also, there's like a plate that bolts between the block and the actual mount on each side. when I removed that, the mount cleared the header, just barely...but the bolts didn't quite tighten down all the way. anyone know what these plates are for, if they are necessary? could I just remove them, and maybe use shorter bolts or something? anyone else have this problem, or know of a way to fix it? any advice would be greatly appreciated. thanks.