I'm not pulling up any good topics on 440 fan mods. I've got a 95 440 z, I'm rebuilding the top end on. While i'm in there. and have it apart, any suggestions? I'd like to mill the tops of the cyl.'s for extra compression, does anybody know what kind of clearance i have to work with? I'm not looking for a "buy a bigger sled response", I just happened to pick up this sled in very good condition, with a dead cyl. cheap, so would like to liven it up a little while I'm in there.