I've been reading this particular thread for the past few days with a lot of interest. My stock regulator is toast and I'm about to be SVT'd thanks to BAT and Downs Ford.
Do you think an Aeromotive FPR would fit?
It looks a lot slimmer and I suspect that it will drop into our fuel rails without any issues.
BTW, do you get a lot of fuel spray when you relieve the pressure at your fuel rail? I'm only getting a little 1/2 second sputter - even with my key in the power position. I suspect that at the very least my FPR is dead and worse case my fuel pump is shot.