Napa 103228X
The pictures that are posted in this thread of timing chains, they are all edelbrock gears, aka corner parts store crap.
Anything with "S-402" "front" is the same chain you get from autozone,o reilys,edelbrock, pioneer, enginetech.
They stretch mucho, high spring pressures will increase the rate of stretch. Stock stuff is fine, but won't last as long nor hold have the stability.
If you're buying a cam and all that...dont skimp. Billet gears and a good chain, important stuff. I've reused a good gear and chain set from motor to motor. I've thrown away more of those cheapo chain than I can remember.
Buy a ten$ioner to go with that cheap $et....or just buy a good 100.00 version.