So i got the worst news today my cobra hasn't felt the same for a couple of weeks now and my guy (mechanic) called me today and said that my cobras racing days are over unless we rebuild the motor. The cylinders 56&7 are down and rings are pinched. So I have two options rebuild my motor back to stock or 5.1? That being said I also want to get 3.4 whipple and make it e85? What do you guys recommend ?

 

I would just go .020 over the 5.1 is nice but won't net much more power wise.

 

and it would be a boatload cheaper since you could reuse your rods and crank.