Anyone using these heads? 318/340/360 or Magnum? Issues? What Rockers are you using? Performance? Are there accessory holes in heads (drilled and tapped)?
There a bolt on and run deal except I had a little bit of a problem mounting the Alt. with the Edel. head because it is slightly longer than the "LA" head it replaced. You can simply grind/cut down the tube stock for it to fit.
I have run the "LA" head from Edelbrock for a long time now. OOTB and on to a 11-1, 360 cube engine, smallish Purple cam, Hooker super comps, 4spd/4.10 geared E body Cuda ran mid 12's...OOTB! At 3600 or so lbs. (Without me in it) , I'd say it went well. Pump gas freindly engine.
And faster I went still.
I currently have an LA motor with the factory stock magnum heads. Was going to go with the 318/340/360 heads but relation of mine advised me to go with the magnum to get away from the shaft mtd rockers.
IMO, Moving away from shaft mounted rockers is one of the most stupidest things I have ever heard. Don't move away from a shaft mounted rocker, since it is a stronger design, though factory "OE" set ups are week for high performance builds.
I used MP and Comp Cams Magnum roller rocker and there hardened shafts. Both were very nice. Comp Cams has them for a reasonable price and Huges has a beautiful set for slightly cheaper.
The only bennifit to the Magnum heads are;
Higher ratio rocker
Any other bennifit is most minor. As in the Magnum head makes use of "CHEAP" Chevy rockers.
Eric, please step away from your "Relations" and enjoy the car.