Rate my shortblock

It was just blowing a puff of smoke when you start it----valve stem seals.
Carbon over everything running rich, BBD carter 2bbl?
How much oil did it use in 1,000 miles?
How many miles on the engine?
Hard starting, the timing chain may be shot, the oem one went out at 80K miles on my dads 1978 360 truck, he bought it new, before it jumped, he still ones it.