You gotta see this ......

Edelbrock has no idea of your deck height, gasket or any number of other things. If buying pushrods, they should always be measured. Anyone that tells you that something needs to be longer or shorter is just guessing at best.

Absolute BS on the requirement for adjustable valvetrain. That's predicated on lift which increases spring pressures the rockers see. Which camshaft is in this engine?

Unfortunately, the people that have "helped" you did you no favors. Tough lesson to learn.