For my rebuilds, i used a little local shop, they had maybe 5 employees
The shop manager told me to call him weekly, the shop was only 7 blocks away & i used that street often, so i just stopped by weekly, to see if anything came up
Schneider Racing Cams is only 20 miles away, i always drove there & bought their Cam packages.
Crower Cams is about 30 miles away, but sometimes their cams were found to have soft metal.
Edelbrock is about 90 miles away & they have a delivery truck that drops off parts around at the San Diego shops a couple times a week
Unfortunately El Cajon Machine Shop closed, but i met the owner of another local shop, Accurate Machine,
Milan Mandich, his shop has built several engines for 1 of the car building TV shows