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old yelr · 06-13-2014, 12:15 AM

I agree with Jonboy, upgrade the tanks with new pumps and focus your energy on a different battle. I'm not even sure that you need to change the switching valve as you already have fuel injection. Check out the thread by Gordonr1973 called "The Ayatollah of Rusty Hole'a 1987 SWB 6.0 4L80E" for some inspiration. He's running a 6.0L and has the factory dual tank set up. Lot's of great stuff on his build. Lots of information on this site you just have to dig a little.

06-13-2014, 12:15 AM	#118
old yelr Registered User Join Date: Nov 2011 Location: Winnipeg, Manitoba Posts: 164	Re: 1987 GMC V1500 Sierra Classic LS swap/build I agree with Jonboy, upgrade the tanks with new pumps and focus your energy on a different battle. I'm not even sure that you need to change the switching valve as you already have fuel injection. Check out the thread by Gordonr1973 called "The Ayatollah of Rusty Hole'a 1987 SWB 6.0 4L80E" for some inspiration. He's running a 6.0L and has the factory dual tank set up. Lot's of great stuff on his build. Lots of information on this site you just have to dig a little.