Which heads to get?

La valve covers fit magnum heads...
One more thought,get one wild and crazy guy to port your current heads...and run.
what you got but you will not be upping your compression unless you cut the heads.
Your heads are probably 68 cc now.
Using edelbrock or EQ will raise compression and you will have to step up on the cam.
More money.
If budget build ,port your current heads.
I'm happy with my EQ heads on my LA motor and have MP valve covers for LA on them