As I had mentioned in the post, this is not an LS7 block, it is an aluminum 5.3 Gen 4 block that was sleeved by ERL Performance, and bored to 4.130. There have been reports of LS7 blocks losing the #7 piston due to detonation which is caused by the fact that #7 is the last cylinder in line that is cooled. The block configuration that I have chosen is good to 800HP. The dry sleeve system replaces the stock cast iron sleeves with high strength ductile iron sleeves. These sleeves are made of ductile iron that is 3 times stronger than cast iron. The ERL sleeves are significantly longer and thicker than stock sleeves, this allows for up to a 4.125” stroke and a 4.185” bore. This is not a carburated motor, as I mentioned it will be all GM EFI. The factory intake is a ported LS7 from LS2 Portworks. See the link below for their built shortblock assemblies. I worked with an LS builder specifically to get the combination correct for my intended purpose, which is a powerful street engine, that can easily go 100,000 miles and maintain excellent driveability. A solid lifter cam and .700 lift does not accomplish that goal. Thanks
http://www.erlperformance.com/gm-ls-...e-short-blocks
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1973 Pontiac Grand Am ERL built 430 CI LS7, Brodix STS BR7 heads, Magnum T-56 6-speed, Modulare 19" wheels, QA1/Global West/Speedtech suspension, Wilwood 6/4 piston brakes. BMW Donnington Gray paint. All wrapped up in a Hurst Pontiac tribute theme.
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