I have no experience with TF heads. I have a 69 L46 engine in my Z right now. Same crank rods and pistons and heads as s 70 LT-1. I went with a Z/28 manifold and carb and the LT-1 camshaft. I am very happy with it.
Federal Mogul still makes a good copy of the LT-1 cam, or at least they did in 2012.
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