Gauge question

[scott5]

I am ordering some gauges for my car and i have most of the details worked out. I am getting 2 1/16 phantom series gauges. I need the nitrous, fuel pressure, oil pressure ones. so here are my questions

I have a stewart warner gauge in my car now mounted inside already with a sending unit, so what kind of fuel pressure gauge do i need so that can just tap into my existing sending unit to mount my new one inside my car? a mechanical or a electrical?

Second is should i get an electrical or mecanical oil pressure gauge?

 

[scott5]

can anyone help me?

 

[19mustang95]

you need an electrical fuel pressure gauge if you want to mount it on the inside, they are almost $200. but the mechanical one + line + mounting cup + misc fittings puts you over $150+ anyway, so it isn't that big of a difference.