I use a local hardware company up in St Pete area for stainless chain- Pinellas fastener. 1/2 the cost of amazon. check your local directory.
anchoring dot com for the line
That is just the EFI manuals
There is also the drive manual, base engine manual, controls manual and cooling system manual
However for torque numbers, just Google SBC fastener torque
Do a compression check.
If you pull the heads, look at the ridge. If you can catch a nail on it, then rebuild.
Pull the pan and plastigage the bearings.
At 80k, I would probably only borescope the cylinders when I went to look at it
