World Products new 8.1 liter block is a direct replacement style with all the OE fitments and accessory mounts. The 8.1 engine is no longer in production and until now there have been no direct replacement blocks available. These engines are common in trucks, motor homes, marine and industrial applications.
Like all World's blocks and heads, The 8.1 liter is American made. World's new digital inspection equipment and quality verification procedures ensure dimensional accuracy and mean you can be assured of total quality and superior performance
Definitions and Dimensions:
Bare Blocks: Due to a vast difference of opinion among professional builders regarding specifications and procedures, all blocks, when purchased bare, are finished within GM +/- tolerances. Merlin blocks are supplied with the following specs:
Deck Heights: 10.245 +- .005
Cylinder Bore: 4.245, 4.495, 4.595 +/- .001.
Main Journals: 2.9375 +/- .0005. .8437 +/- .0005. 4.750.
Lifter Bores: .8437 +/-.0005"
It is the responsibility of the engine builder to finish the block to his or the end user’s preferences. MERLIN 8.1: Freeze plugs, dowel pins, oil galley plugs and cam bearings are not included or installed.