oil light started coming on last week, no all the time though, started
by just coming on when at idle, give it the gas light goes off, so park
it or a few days, drove it again,  fine for a couple days, then light
starts flashing, equal on- off flashes, turn it off for a few minutes,
light would barley come on, give it the gas light would go off, let a
sit a few hours drive it a little while, light started coming on
dim....parked since then...ok

bought new sending unit, where exactly is the unit at?  found what I
thought would be it   ( back of engine (left side) under distributor )
but does not look what parts store gave me, as far as nut sizes the one
on the car is small, the one I bought is big, and of course the size
wrench I need to pull it off is in my work toolbox , am I looking at
the right thing?

also just thinking, before all this started happening, I changed my oil
2 weeks prior, could it possible be a crappy fram sure-grip oil
filter...

any help would be much appreciated