5.3 in 1987 chevy

[ace]

Where can I find fuel pumps to go in the stock gas tanks? I also want a digital dash.

[75K30]

Not sure I understand the question here ace. Are you wondering what type of pump you can use when you install the Vortec engine? There are plenty of aftermarket pumps that are able to keep up with the pressure demands of the new engine. You will need a return system, and usually the 5/16" vent / vapor line is suitable.
How are you gonna run the ECM? Still going to have alll of the sensors, or are you going to run without them?
Going to use a 4L60E also?

[ace]

I have all the wires and computer I am trying to see if i can use the same gas tanks or what.

[75K30]

Originally Posted by ace

I have all the wires and computer I am trying to see if i can use the same gas tanks or what.

You can use the original tank, but it is raher tall when used with an earlier truck, this means that the tank will stick out below the frame and body slightly.
The early truck had a tank that went between the frame and body, and the silverado that hasd donated the parts had a wider frame and a tank that mounted inside of the frame rail on the driver side.
This means you will have to get creative when instaiiling the tank.
However, you already have a tank and sending unit that work with your existing gauge, and it would be simple to just get an aftermarket pump and regulator for this little powerplant.