Lots of info and tips on changing the upper chain rails and timing chain. (Good presentation on Thomaspin web site). But couldn't find much on the lower guides. I have just about everything removed but the water pump and the a/c bracket, but I don't know what to expect when I remove the cover. I'm assuming it can be removed with the heads still on the car. I wasn't planning on doing this without a manual but things happen......just trying to help someone out. Thanks for any info.