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I'm looking into a '92 Buick Roadmaster with the 180hp 350. I'd like to know if that engine can ultimately be upgraded to LT/1 spec, or if the LT/1 is a unique block, i.e. one cast for roller lifters and cams, and the other isn't. If I can upgrade, what parts do I need? I Imagine heads, cam, and intake...any specifics? Are these parts obtainable? Also, what other parts are out there for these full-sizers?
 

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You can't convert a gen 1 motor, LT1s are gen 2 and have reverse cooling so they use different heads. A lot of the internals are the same. You could always find a junkyard Roadmaster or Caprice and just swap the whole powertrain.
 
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