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best bet are hughes 1110 springs and 2.2L retainers with oem mag locks...that'll give about .520-.540" lift capability with stock heads



And with that much lift, you'll need to have the valve guides cut down some. I wouldn't even fool with the stock Magnum valve springs. Even though they are bee hive, they are very wimpy. I think they float with the stock cam at high revs.

Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph