I’ve got a purple shaft out of a 440 with the number 20086h stamped on the end. I measured the lift and it looks like .496 on the intake and .487 on the exhaust. Does anybody have any numbers and specs on a purple shaft like this. I’m not going to reuse it but I’d like to know the duration @ .050. This motor has poor vacuum. After figuring the true CR, it needs more than just a cam. It’s only 7.6:1.