degreeing small block cam

I stopped by and seen my short block is together. He lined the cam and crank up with the gear set.

This is a street car and probably will take it down the track once if I think it runs like it should.

Now how important is it to actually degree the cam in? or is setting it with the timing marks be good enough?

He said since the gears set was not adjustable he just lined it up. I told him that they have keys to adjust them. If it will make much difference I will ask him to do it and get the adjustable keys to correct if it is off.

Again this is just a street car but want it to run good.