Fuel Pressure gauge installation
 

Is there a kit for installing a fuel pressure gauge on a 502 EFI? Should I use mechanical or electrical? If mechanical can I use 25 feet of hose the put the gauge in my dash? Will that cause inaccurate readings?

Use electrical. That way you have less problems.
Install sender
run wire to guage.

If mechanical you have hoses and a pressure reading from raw fuel converted to something else (in cars it's antifreeze) through a diaphram.
If the fuel hose develops a leak.... ahh you can see where I'm going with this.

DAVE