[muzzfactor]

Hey guys I'm working on my '79 Trans Am with a pontiac 400 and I'm having trouble getting the oil pressure sending unit to fit properly. The stock one is rather "fat" and keeps hitting on the bellhousing before I can get it to tighten up. There really isn't much room back there between the bellhousing and dizzy. Does anyone know if I could use a narrower one or know a part # I could try? Thanks.

[ortamenxs]

I hit a similar problem on 70s chevy, I think I had firewall clearance issues. I bought a little brass after market one, only about an inch high, and as big arond as a sharpie. But it wasn't electronical, just ran the line to my oil pressure tach in my car. If thats all you need save money and hit the brass connectors at a Menards first .

But it sounds like you want one with a wire hookup . . . my buddy had a pontiac with a Y type sending unit, I know he couldn't get it to fit , it had sensors on a brass fitting. He ended up buying an aftermarket one as well, don't remember the name, but it was shorter and very fat with one wire hook up. I don't know about thinner ones if you need an electrical one.

[cobalt327]

Originally Posted by muzzfactor

I'm having trouble getting the oil pressure sending unit to fit properly.

What you'll need to do, is use a pipe "nipple" to thread into the block w/another (possibly angled) fitting atop that with female threads to fit the sender.

Your sender is designed that way (fat) because you have a gage and not an idiot light.

[ortamenxs]

Really I always assume fat = light, thin=gauge. Perhaps it is the difference in what we each use, I've alwas seen short, fat little wire hook ups, and thin brass fittings, not vice a versa. If it is a 79 though should have a "idiot light" stock. I posted some pics of what we are talking about, as far as the fittings and nipples goes you can pretty much find any size/shape you want and or need.