There are 2 type of suction valves, straight and angled (referring to the large port orientation). The straight were on the 81-84 and the angled were on the 84-87. Somewhere around 4/84 they made the switch. Please compare your top plate wit the one pictured to ensure you get the correct one.
Good used later style angled suction valve top plate. O-rings not included/guaranteed, we recommend installing new ones.
Compressors don't come with top plates so if yours are bad/damaged, this your solution.
Part # 88372-22100.
Note- The R134 adapter may not be included, you should assume they will not come with it.
Limited quantities.