The pad on the front of the block says...F0504CSU.

Reportedly a 400 small block out of a 1975 passenger car (Smogger Caprice?).

2-bolt or 4-bolt?

Compression ratio?

Horsepower and torque ratings?

Any other info would be welcome...thanks in advance!

Shows as a 1974 175hp 400 automatic out of either a Chevelle or Caprice.

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JohnZ
'69 Z28 Fathom Green