Which 727 will work?

The 904 can take all your slant could ever putout in any form. There is zero reason to put a 727 behind a slant. You will cost precious power that the slant does not have to begin with and cost yourself some MPG in the process.

I completely agree. There are guys running 904's behind strokers that turn low 10 sec. 1/4 mile times.

The only reason I can think to install a 727 is to make your car slower and get less fuel mileage and that makes no sense.