OK, the time for gears is getting close. I have numerous people locating a set of 4.10's for me, but I am running into dead ends with them. It seems production of the Super 44 sets is over or nearly over. I have a line on 3.90's and 4.56's, hence my problem. Has anyone EVER ran 4.56's in their ZR-1's? I personally don't know of anyone who has. Also, with the 4.56's is their a speedo correction gear for them, or would I correct it electronically only? What about the heat 4.56's would create over a long distance drive? Is this a cause for concern? What do you think?, hold out for 4.10's or take a 3.90 or maybe even a 4.56? I have questions, I hope you have answers!!