![]() With the recommisioning of this bolt hole, GM closed off the bolt hole at the ~1:30 o'clock position in the block. Interestingly, this bolt hole had been used on earlier Chevy V8 applications, but had become just a vestigial, untapped boss on these block castings through the latter portion of the Gen I & Gen II era. Generation I & II Transitioning to Generation III Block to Bellhousing Bolt PatternĪs mentioned above, the block bolt pattern was largely the same, and the locating dowel positions and diameters were fully identical but GM engineers opened up the bolt hole on the LS / Vortec blocks at the 12 o'clock position, as viewed from the rear. ![]() Ford 1.8L - 2.5L "Pinto" Engines into the Jeep.Chevrolet, Buick & GM Engines into the Jeep.
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