What exactly is the reasoning behind wanting to use explorer rocker arms? Are you using the explorer (gt40p) heads?
I'm not expert on this but I believe both the explorer heads and your heads use pedestal mounted rocker arms so i can't see any problems there.
What ratio rocker arms does the explorer come with? I'm guessing 1.6:1 which more than likely is the same you have so again i'm assuming here that they should work out ok.
Then again you know what they say when you assume
Is there something wrong with your stock arms? Why not upgrade to a good set of roller rockers?