Do whatever you can with the front of the fenders. I wasn't allowed to do a whole lot at this derby so she's pretty stock but still pretty nasty. These things are fun as hell to derby and that's coming from a W-body guy.
Going up or down? I don't think I'd do either. When and if I do it I'll be cutting a pie out infront of the K-member and pushing the frame rails up to be straight with the rest of the sub. And the only way I would do that is if I could shorten it and the bumper mounting rules really sucked. I've got a crusty one out back that may just turn mod class this winter.
Pressure tipping requires no cutting... ya The front needs to be shortened quite a bit.
around here we call it cold bending but I understood what you meant. It could be done but i don't think it will do what you want. Are you talking about bending it down at the firewall or up infront of the K-member?