The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

clinebarger · 01-17-2012, 08:13 PM

Not all 67-72 tanks have those hose nipples in the top of the tank, The two 69s & a 70 Ive owned didnt have them, Its a emission thing, Not sure when GM started doing that.......Ive seen 71s with & without it. But, Yes you can use them for the return line.

I highly recommend drawing fuel from the BOTTOM of the tank when using a external fuel pump. The last conversion I did to a 67-72 truck....I had my radiator shop weld a 1/2" nipple in the bottom of the tank to feed the pump. 3/8" out of the pump.

01-17-2012, 08:13 PM	#2
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: another stock fuel tank question. Not all 67-72 tanks have those hose nipples in the top of the tank, The two 69s & a 70 Ive owned didnt have them, Its a emission thing, Not sure when GM started doing that.......Ive seen 71s with & without it. But, Yes you can use them for the return line. I highly recommend drawing fuel from the BOTTOM of the tank when using a external fuel pump. The last conversion I did to a 67-72 truck....I had my radiator shop weld a 1/2" nipple in the bottom of the tank to feed the pump. 3/8" out of the pump.