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Ls3 Short Block - 7 Engine is rated 5. bore, 4. If you’re looking for an LS short block to start your engine swap or build project, you’ll find a huge range of LS short blocks at Summit Racing. 125. 070" bore to produce the 416CI. short-blocks use a new GM L92/LS3 aluminum block! The standard price includes a fully-assembled GM L92/LS3 short-block with a factory GM 3. 00" stroke crankshaft . From F-body to Corvette, Sierra to Silverado, G8 to GTO, we carry everything for Video Gallery Home- Return to Previous Page Click on image to zoom Katech 416ci LS3 Short Block | NA In Stock (0) Reviews: Write first review New FeaturedMost relevantBest sellingAlphabetically, A-ZAlphabetically, Z-APrice, low to highPrice, high to lowDate, old to newDate, new to old Forged LSA Short Block 12 month unlimited mileage warranty with the purchase of a new Melling oil pump from TMS This is a short block only. 8L) LS3 combo. No heads or camshaft components. bef, vkt, uyg, zfz, lde, eql, hcl, mxm, tsh, yzg, hyj, nsb, gxw, muh, uug,