I vote for the LSx..
Why?
An LSx engine will probley end up cheaper than a SBC motor with an aftermarket EFI unit. A LSx motor is also quite a bit lighter than a SBC motor and that equals free performance.
We can also talk about milage.. my nearly 400rwhp 2000 SS Camaro got almost 27mpg on the freeway.
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"A ship in port is safe, but that's not what ships are built for."
See Bad Penny run the cones: https://www.youtube.com/watch?v=8GUPPIX-92U
1971 Chevelle Wagon - Roadster Shop Chassis ProCharged Shafiroff LS and lots of yada yada
1968 Camaro - Project Track Rat - 440 RHS LS
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