You are talking abot the 4/7 swap cam for conventional firing order SBC’s and LT1’s. LS1’s fire totally different. To my knowledge there are no aftermarket cams for an LS1 that alter the firing order, there is no point.
Daddie—wait til you find out how easy it is to swap an LS1 cam. You don’t even have to remove the intake manifold. You take off the rockers/pushrods, and spin the cam. All of the lifters are held up in their lifter trays, allowing you to pull the cam out.