HELP! I bought a mess?

I say use your Magnum short block and flex plate, and get some CH318B Engine quest heads and a solid cam and lifters then use everything else from the LA motors.
Your LD340 will fit those heads and will work great on it.
Then you can learn what those adjustable rockers are about.:D
I have looked a little into the engine quest heads but my impression of them is that they use all of the magnum parts on them and that the older rockers will not work on them. Am I incorrect?