I used Holley Blue pumps on SPF 887. Each one that failed (2) lasted about 30,000 miles or so, then failed. The first one just quit, but fortunately I was at work.
The second one started leaking (internally) at the seam and dumped a lot of fuel before I could pull the fuel line off it.
I have over 80,000 miles on her now and had the 3rd pump replaced with a mechanical pump before it could leave me stranded.
The Holley Blue pumps come with a regulator, and the regulator must be used in a carb setup. To be fair, I never installed a relay. That may have saved my first pump from failing. Blas has a good wire schematic that shows how to wire in a relay - I think he also has - or used to have - a relay kit available.
There is a relay kit available at Cobra Valley.
Cobra Valley's High Power Relay & Wiring Harnersses
I highly recommend adding a relay if you are running an electric fuel pump on your SPF.
Jim Kellogg