The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Slightly different EFI dual tank question

Nick_R_23 · 05-26-2020, 10:59 PM

So I’m planning on going EFI and keeping dual tanks on my ‘78 K20. My question is, didn’t the fuel neck opening sizes change sometime around 80-81?

Instead of going the typical ‘87 TBI tank and sender route that most do, I’m thinking about buying a new pair of 1978 tanks, and using a pair of Holley drop in EFI modules that utilize the Hydramat system instead of baffles. This would allow me to keep the stock size filler necks and hoses.

05-26-2020, 10:59 PM	#1
Nick_R_23 Registered User Join Date: May 2016 Location: Willow, Alaska Posts: 839	Slightly different EFI dual tank question So I’m planning on going EFI and keeping dual tanks on my ‘78 K20. My question is, didn’t the fuel neck opening sizes change sometime around 80-81? Instead of going the typical ‘87 TBI tank and sender route that most do, I’m thinking about buying a new pair of 1978 tanks, and using a pair of Holley drop in EFI modules that utilize the Hydramat system instead of baffles. This would allow me to keep the stock size filler necks and hoses.