That's Edelbrocks factory machining... They do a CNC "port match" It goes into the port at an angle around 1" deep. It looks more aggressive on some castings due to core shift.

You can usually open the pushrod pinch up to around 1.00" depending on casting core shift, after that you'll be into the pushrod hole. Very popular to Sleeve Edelbrock P rod holes with brass tubes....

I usually take them to around .980" unless going for max effort. & yes there is flow & power sitting there... also CSA