Would like to get some more oomph from my 318

mguner said
Get the low first gear set for the 904. An H or X pipe will also improve the low end if you don't have one. Also check the advance curve settings for a good gain.

Like this? Low-Gear Sets - A&A Transmissions
Cool, I had never heard of that! Wish I had known when I rebuilt the trans.

I do not have an H or X pipe, just 2.25 inch exhaust.