It might pay to check out the Sard info to be sure, but the FPR usually goes after the fuel rail. So from your fuel pump, run it directly to the rail, at the firewall end (the big thing on that end is a pulsation dampener, I've had no problems after ditching that). at the other end of the rail sits the factory FPR (the tapped hole is the feed for the cold start injector, it can be blocked)
Since your aftermarket one wont fit there, you need to find/make a fitting to bolt to the rail that you can run a hose from. This hose then goes to your Sard FPR. The outlet from your FPR goes back to your tank/surge tank.
Connect the vacuum line to manifold pressure.
If it's all a bit much of a headfuck, just use the stock FPR, unless you are making relly silly power this will work fine.
Hen