The rubber plug is called a push in fill plug. Looks like
you just pry it out.
The block on top should be the RWAL (rear wheel anti-lock)
brake speed sensor.
Bob
Burlington, Ontario, Canada
tigers@bserv.com
Current: '97 CC Sport, 5.2L, 3,55 auto., 4x2, Gibson dual, K&N filter
element.
'85 Shelby Turbo Charger, 2.2L, manual.
'70 Challenger, 383-4bbl, auto.
Past: '71 Road Runner, 340-4bbl, auto.
'70 Duster 340, auto.
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