For Sale: Small Block Chevrolet 327 Engine – 340hp Spec
This engine is a freshly rebuilt 327 cubic inch, casting #3782870 (“870 block”), built to 340 horsepower specs. It was professionally machined and assembled with 11:1 pistons and camel hump heads, and has a chrome oil pan and standard balancer.
Zero miles since rebuild – never installed in a running car, only test run monthly to keep it fresh.
Originally purchased as part of a rolling chassis project that was never finished.
Cylinder head details
Casting number: 3917291
Date code: O207
"O": The 15th letter of the alphabet, representing the 10th month (October).
"20": The day of the month.
"7": The last digit of the year, in this case, 1967, since these heads were produced between 1967 and 1968.
Casting number 3905393 manifolds (used from 1966–1968 on 327/350 engines)
I have an endoscope available for internal inspection if you’d like to verify the condition before purchase. More photos coming soon.
Perfect for a restoration, hot rod, or period-correct Corvette project.