Swapping K-members won' elp you with the weight difference, the iron block is about 140# heavier then the aluminum block and K-member only saves you like 25#. I would rebuild the 5.7, hell you can get my exact engine for $3800 if memory serves (that is a fully assembled shortblock wih forged pistons and rods, custom cam, timing chain, oil pump etc etc. I have no complaints at all.
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-Nick
9/11/01 NEVER forget!
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