5.3 blocks, just some FYI.......
07-22-2009, 05:55 PM
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5.3 blocks, just some FYI....... I work at a machine shop and we're building a 5.7L from a iron 5.3 and were just curious if you could take a 5.3 out to a 4.000in bore. So, got hold of a junk 5.3 block (early '99) and went to boring, didn't hit water until 4.140 on most of the cylinders and a couple went 4.180. So if some of you guys have a 4.8/5.3 block and are wanting to build a budget street motor with some L92/LS3 style heads that's pretty good news. Thought people might like to know.
07-23-2009, 01:44 PM
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Definately not for boosted or N2O, but for a N/A street motor it should be fine. Always get it sonic checked (if available) before you start cutting just to be sure, just be smart about the whole thing.
