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: Would this be a good engine to buy (5.3 LS1) 1320King Aug 6th, 10, 03:03 PM A guy that I know is selling an aluminum GM High Output 5.3 LS1 engine. It is complete and comes with wiring harness ($600). Would this be a good engine to buy? I would probably try to convert it to carbureted because I know very little about EFI. Good engine or would it be a waste of time??? Nashville Beth Aug 6th, 10, 06:11 PM Check this out: http://www.hotrod.com/techarticles/engine/hrdp_0810_gm_crate_engine_tests/ls237_zz4_350.html TJS69 Aug 6th, 10, 06:14 PM As far as I know the 5.3 is based on the LS1. It is an iron block with aluminum heads, used in trucks. shonuff Aug 7th, 10, 08:21 AM A guy that I know is selling an aluminum GM High Output 5.3 LS1 engine. It is complete and comes with wiring harness ($600). Would this be a good engine to buy? I would probably try to convert it to carbureted because I know very little about EFI. Good engine or would it be a waste of time??? If Its a 5.3L the LM7 has an iron block and aluminum heads If its a 5.3L the L33 has an aluminum block version of the LM7 The LS1 is a 5.7L 5.3L 3.78 bore 5.7L 3.90 bore $500-$800 is on target for a 5.3 regardless of alum or ironblock.... smallbore v-8.... You can get a 6.0 for a few dollars more $800-$1500 and more power...... | ||