When I took the Edelbrocks on my current 360 in to my machinist, he told me to send him the cam info that included specs for valve spring pressures and he ordered and installed the springs himself as part of the service. But then his business isn't just "regular" machine shop/engine rebuilding, he builds race engines and transmissions...
Similar to how I brought in a 440 block to the same guy, asking for a .030" overbore along with cleaning up the decks etc. and he said he wouldn't touch the cylinders until he had the replacement pistons in hand so he could bore the cylinders to the exact size for correct piston-to-cylinder clearance.
