The l84 and l87 engines have 16 of the AFM lifters, the cam has the same profiles on the entire camshaft unlike the DOD/AFM, in theory you should be able to use the stock cam so long as it’s not damaged…. I have been having an issue with the number 8 intake lifter wiping the locators in the lifter trays… the lobe on the cam looks good as far as I can tell, but I have ordered a DFM delete kit and a replacement cam, at this point am researching whether I can use the range DFM disabler with the hardware removed or if I have to suck it up and have my ecm unlocked