Measuring pushrods

I am a bit confused on the correct way to measure for custom pushrods.
I have a 95 magnum block that has the cylinder head oiling hole already there so I am running LA Edelbrock heads that were set up and ported by Mike at MRL.
I'm running the Hughes shaft mount 1.6 roller rockers. The cam is a custom roller grind that Mike uses on his builds. I am using stock Melling roller lifters as suggested by Mike.
My problem is how do I measure for pushrods?

I have #1 cylinder at TDC on compression stroke. The lifters are on the base circle of the cam. I have a checking pushrod and when I lengthen it out to where there is a little drag on it I locked down the adjuster and turned the motor over. The pattern on the valve stem is perfectly in the center. My pushrod length checker measures 6.58" overall and the cup depth on the checker is .150. Does this seem like the right way to measure?
It seems like that length is pretty short.

Thanks for listening.