Solid flat tappet cam

I ran a solid lifter cam on my old 318 for about 4 years as my daily driver. If you end up using some old 273 adjustable rockers, just add some jam nuts so the rockers don't back off and you'll be fine. Once mine were set they pretty much stayed. Crane cams used to make a kit with new adjusting screws and jam nuts, don't know if they still do.
I would check them from time to time depending on how many miles you put on it, but like what was already said, it's not a weekly or even an every month problem.
EDIT:
OOPs, sorry I didn't see the BIG BLOCK A body tech at the top of the page, and I was just reading a small block post. Now back to my regular scheduled posting....LOL