hey guys. removed this cam years ago from a fresh rebuilt 440. always assumed it is just a stock replacement, & now trying to find out what it might be.the front half is purple , but not as vivide as other purple shafts I have seen. only numbers stamped on the end are 856440 and a small red paint dot. lift measures out to .465 on both lobes with a caliper & dial indicator useing V-blocks. any ideas ? Thanks