Breather hose fitment

[MJRemi]

I want to replace the valve cover breather hoses, front and back, and noticed they are listed by specific years on teamcherokee. Are they really different sizes or can I use later valves on my 87? If I can use later year valves, are any specific years better than others?

http://www.teamcherokee.com/Emissions/index.html

[ParadiseMJ]

There are different sizes for RENIX and for HO's. The grommets and elbows are different on the RENIX rigs. The elbows and grommets for an HO are larger. Just follow the correct year and you'll get the right part. The ninth one down are the correct lines for your RENIX.

[MJRemi]

Thanks, I'll be replacing these soon so I wanted to be certain.