I finally got the guides cut down on my heads. I took them to a local shop that specializes in racing heads and intakes beacause they are close to where I work. The cost was not bad at $ 50.00, but I was a little disappointed with how they looked.
The bottom of the stock guides measured right at .845" before they were cut. I disassembled and cleaned them up real good before I took them to the shop. I had printed a diagram off of Comp's website that showed a cutter that would cut the guide to .775" which they recommended for use with the 981 springs. I took the heads and one of the springs to them, and told them that I wanted them cut to .775". The guy working there wanted to measure the ID of the spring and damper with a micrometer. He did, and said that they would not have to be cut to .775" for them to work. I told him OK, and left them; I took the spring with me.
I went back to pick them up the next evening, and they were working on them; one had already been cut. I took the spring and stuck it down over the guide; it was pretty tight. The owner of the shop was the one cutting them. He said that since I didn't leave the spring (I was told they didn't need it), that they cut them to .795" like I had requested. I told him that .775" was what I wanted; his guy said that .795 would work.
After telling me that my 981 springs were a POS anyway, he said that he would re-cut them, but that I would have to come back. So I go back the next day; they were smaller alright; some of them measure around .750", and others around .710" ! I paid the guy and left with them.
The springs and dampers don't rub the guides now (of course). I don't guess the diameter of the bottoms of the guides being a little different will be an issue will it ? The retainer and locks keep the spring centered right ?
The shims that I bought have a .814" ID. They fit a little bit loose on the guide now, but they still support the spring OK. Does that sound OK ? Thanks, Ron.