When ordering a Sending Unit....
 

I had some trouble with mine. Well here we go:

I have a v8...so I ordered a v8 67-70 sending unit from Chevy Duty.

I got it and soon realized that the fuel line coming from the sending unit has a larger fitting than the fuel line in my cab.
So I went to a parts store and found a fitting that would fit the sending unit but that I could attach a rubber line to. so I cut a few inches from the steel line and attached the rubber hose. thats how it worked out no problems.

Should I have ordered one to match the original engine size, which was an inline6?

Well....if you need them I have the smaller fittings from two fuel lines that I just hack-sawed off with the bend and about 3 inches of line.

f I were you I'd replace all the I6 5/16 line with the v8 3/8 line. There is a reason the v8's had larger fuel lines, even the 307 2bbl had them I believe. More cylinders mean more gas, you may find under full accelleration that it's starving for gas and has no power.

well.....it cuts off ocassionally when I put it in gear, and I have have it set at a high idle so it doesn't make the "I'm gonna cut off right now sound".

Your ingenuity is pretty good. Only where is the rubber hose? In the cab? Not the place for it. If so, run your steel line from the sending unit behind the seat through the floor. Then put in a 90 degree bend to the framerail and connect your rubber hose there.

I'm with CPNE about just replacing all of your fuel line when you get a chance. I don't think you will experience starvation under most driving circumstances. If you do some highway runs at higher speeds and then go to pass someone, you would likely run into a starvation issue, plus the pump has to work a little harder to pull the fuel through a smaller hose.

At idle, you realy shouldn't have a problem (except after a high consumption run). You may have a tuning problem if it won't idle properly.

I ordered the 6cyl sending unit when I replaced mine. I run a fairly healthy 350, with edelbrock carb, and never have I had fuel starvation problems. If you have hesitation going in gear, or accelrating, you have another problem, possibly fuel filter.

You know.....I have two filters one before the pump and one before the carb...should I maybe get rid of one??? or all???
My tank is like super clean....so I don't have to worry about it shooting crap into the pump.

will the 3/8 rubber hose fit on the current fuel pump and to the carb???