It's a 557 block, so no interest in a high performance build, although these will take 450HP all day long properly prepped. Other than for restoration, nobody want these.
The 6X-4 heads are desirable for cheap CR bumps in 455's
The carb is a great one with a jet and orifice change.
The valve covers are desirable if not pitted and dinged.
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1976 LeMans B09 Freeway Enforcer, 455/M40 Smokey
1977 Trans Am, 400/M21 Black/Gold Bandit. 44K actual miles
2017 Sierra SLT 1500 Z71 4X4 
2019 Canyon SLT Crew 4X4 
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