Quality Restoration Parts for American Muscle Cars and Classics. 48L LS Stroker makes 607 hp. Small bores limit head flow by shrouding the valves, large bores unshroud the valves and allow more air to get into the engine. More air allows more fuel to be burned. More fuel makes more power. 8L crank in the LS3 block required a custom piston from JE with a compression height of 1. Since oiling would be critical a.

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