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Lots of good stuff in there.
You can get a healthy amount of power out the factory LT1 without having to do an engine swap.
 

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I plan on going with a stroker. Many are swapping out for a LS which makes it easier for me!
 

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Engine vs engine, LS will always make more power for less money than an LT, but it will probably come out in the LT's favor once the costs of swapping are included.
 

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I put a 454 in my wagon. It was not all that difficult, but you will need a well built trans to work on to the engine without breaking. I picked a JY block, and rebuilt it with aluminum heads and a fuel injection system. A Gen 6 454 allows you to get away from a distributor and use the crank sensor for a trigger, and coil on plug ignition. You need a few quirky things, that I have figured out, and it bolts into the original engine mounts. It is a lot of fun to drive. With the aluminum heads, it only weighs about 50 lbs. more than an all iron small block.
 
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