What are these two plugs?

JGizmo said

It'll bolt up, it's just that the new 225 I have probably hasn't ran in 40 years. It is from a 1970 so I need to use a 170 oil pan and pickup (my old 170 has a hole in the pan and I'm guessing metal shards in the oil pump/pickup). I also need to use the distributor from my old motor because this one didn't come with one. And I'm definitely a beginner so I need to figure out timing.

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ok, so timing is easy on these slants.
This is not the recommended way to do this but I had no timing light and was new at it then too.
I put the motor at 10-15deg.BTDC using the crank timing marks.(with the distributor out)
Then since the slant dizzy has an oblong hole, and marks at the distributor base on the block, I put the distributor in at 10deg. BTDC as well. for a total of like 22-28deg.
I did this because I was not running vacuum advance and did not realize what centrifugal advance was at the time.
It worked and was reliable, but using a timing light is definitely more accurate if you have access to one.