Comp Thumpa Cams???

my cousin s got one in his 318 it's real lopey but he says it pulls good because the dur.is low ? anyway he didn't but the kit he just bought the cam from jegs 295 it's rollerdesign but uses's reglur flattappets lifter he used his factory rockers pushrods lifters just changed cam and springs i went to the comp site and double checked this