If you stick with the 1.92 intake valve, the heads are not going to perform as good or better than the Magnum Edelbrock head!
Once you go to the 2.02 valve, and do a good valve job, and blend it in, the EQ and Indy iron head will out perform both Mag. and LA Edelbrock heads OOTB.
We sell both EQ and Indy, and I also sell Edelbrock...nothing wrong with Edelbrock's, they just need port work to make the same power as the iron heads the way we sell them which ends up saving money over the Eddy's. Any of these are FAR better to start with than an OEM head IMO unless your building a very mild budget engine...then the oem heads will win!
Brian