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#1 |
Registered User
Join Date: May 2015
Location: Richland, WA
Posts: 128
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8.1L Vortec Swap in 76 K10 SWB - Fuel Tank(s)
Hello Everyone.
Its been a while. Once my K20 Camper Special was stolen I floundered a bit. I have since purchased a 76 K10 Short Box with the hopes of utilizing the 8.1L and the Allison Trans. The K10 lost a driveline at some point and tore out the fuel tanks. The owner then replaced one of them with a roughly fabricated single aluminum tank. With my plans of swapping the 8.1L into the truck what are my best options for a fuel tank? Do i buy two short box tanks? Do I try to retrofit an 8.1L tank into the 76? Do I go with a single tank? Thoughts? Thank you. Dan |
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#2 |
Registered User
Join Date: Nov 2014
Location: Norfolk,NE
Posts: 136
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Re: 8.1L Vortec Swap in 76 K10 SWB - Fuel Tank(s)
You're going to want all the fuel you can get with an 8.1. Either do two factory 73-86 tanks with the plug and play Holley pumps, 1987 tanks with factory sending units and upgraded pumps, or do a blazer/suburban tank in the rear.
__________________
1982 Sierra Classic K15 RC/LB 6.2L Diesel 700R4 1988 GTA Trans AM 305 TPI 700R4 1993 Formula Firebird LT1 T56 1995 GMC K2500 ECLB 6.5L 4L80E 1996 GMC K3500 CCLB LB7 6L90 |
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#3 |
Registered User
Join Date: May 2015
Location: Richland, WA
Posts: 128
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Re: 8.1L Vortec Swap in 76 K10 SWB - Fuel Tank(s)
Thank you.
Yes, more fuel! Ugg! But lots of Torque ![]() Since I have to buy new tanks I might as well purchase wisely.... for a change! LOL Dan |
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#4 |
Senior Member
![]() Join Date: Dec 2014
Location: Edmonton Alberta
Posts: 1,344
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Re: 8.1L Vortec Swap in 76 K10 SWB - Fuel Tank(s)
I did a blazer tank in the rear for one of my SWB squares, fit like a dream. I believe that 1987 onwards are more good to go for any EFI setup.
Dual tanks are nice but this way you don't have to putz around with the dual tank swiches/relays/solenoids etc. Unless you have that stuff already, that is.
__________________
DAVE Edmonton, Alberta 1959 Apache 1967 K20 1968 C20 1970 C10 1972 GMC 2500 1981 C10 |
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#5 |
Registered User
Join Date: May 2015
Location: Richland, WA
Posts: 128
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Re: 8.1L Vortec Swap in 76 K10 SWB - Fuel Tank(s)
Yeah, I really dont have much of anything at this point and was going to buy both stock tanks/pumps etc....and thought better about it.'
What year blazer tank was it or are they all the same? Thank you. Dan |
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#6 | |
Senior Member
![]() Join Date: Dec 2014
Location: Edmonton Alberta
Posts: 1,344
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Re: 8.1L Vortec Swap in 76 K10 SWB - Fuel Tank(s)
Quote:
1987 and up were EFI, so I would think that's the one you want. A suburban tank would be even larger and you'd have room for it I assume if you have a LWB. Maybe someone can chime in and confirm.
__________________
DAVE Edmonton, Alberta 1959 Apache 1967 K20 1968 C20 1970 C10 1972 GMC 2500 1981 C10 |
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#7 |
Registered User
Join Date: Jun 2014
Location: Carson, IA
Posts: 19
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Re: 8.1L Vortec Swap in 76 K10 SWB - Fuel Tank(s)
I love the 8.1L in my '03 Silverado. You made a great choice in powerplant.
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