[MustangManGT]

I have a 1987 mustang gt 5.0L 302ci but will bore it out to a 329ci and will be sleeving it. It's almost totally stock so which set up would be best for horsepower and duribility? 3:73 or 4:10? I'm planning on making a race/street build.

 

[ratio411]

That's like asking which is better, crunchy peanut butter, or smooth.

They both have their place, and you will have people lining up to fight over which they personally prefer.

It all depends on so many factors as to which of these is best.
You can't even begin to discuss it without telling us what tranny you are using.