Some guys are fortunate and are able to run the SD with mods. But, not me, I had nothing but driveability problems with my speed density with heads, intake & cam mods. Once I went to mass air things got better but it wasn't until I got a custom burned chip that I was able to correct them completly.
I would bet that if the only mod you have is an intake you can get away with it...but you never are certain until you try it.
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fordgasm
CLICK HERE to see my 87 GT