Another pushrod length question.

So put the motor together today and got to the valve train part. When I bought this it had bad lifters and a wiped cam and bent pushrods. I repurchased the same parts assuming PO did not adjust rockers properly. Well I'm using edelbrock 6077 heads. with edelbrock 7177 cam. The heads say to use stock length 7.375. I know measuring these cup/ball can be difficult. My new pushrods measure 7.5 end to end. They are melling mpr-155. When I look those up they say they are actually 7.342 shorter than what heads recommend. But when I was trying to set my rockers...the cups hit the rocker. These are stock stamped rockers. Everything just seems like my push rods are too long. This is a pretty complicated topic for us noobs. Looked at many other threads but not sure. Help please. :???::???: