No worries...I just got off the phone with IEquus and they said the electrical version is part 8262...I have an 8242. I need to find the size and thread pitch of the stock sensor. The guy said if I have that, they can give me a part number that might fit perfectly. I'm pretty sure I saw that somewhere....just have to go hunt for it.
OK, here's what I found out...
OEM sensor is a 1/8-28 BSPT (British Standard Pipe Thread)
The IEquus 8262 is 1/8-27 NPT (National pipe thread?)
The IEquus tech said I'd be hard pressed to find a tap for the 1/8-28 BSPT....but in looking around, it looks like many people have used the 1/8-27 NPT in the stock location with no problems (Teflon tape probably helps). So I'm going to return this gauge and get the 8262 and I should be good. JC Whitney has them for $38.99....bummer that they don't sell them for the $26.99 price for the mechanical.
Rog, you sent me a PM with part number 8162...that's a 1.5" guage....the 8262 is the 2". I'll be looking for the 2" as I'm getting old and don't want to be causing roll-over's from squinting to read the gauge!
UPDATE: Go figure....Amazon.com has them for $29.99 and because I'm a "Prime" member...free two day shipping. Cheaper then the $35.98 I paid at JC Whitney.
iEquus 8262