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Old 10-03-2017, 11:42 AM   #1
Big Blue
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Gas Tank Size

I was thinking about changing out my gas tank and sending unit. After looking inside the tank I was amazed how clean and rust free it was. So I will not be getting a new gas tank. My question is what size tank is in now? It is a 1978 79 K5 Blazer. I need this information to order the right sending unit.

Thanks, John
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Big Blue ( John )
79 Chevy Pick up.....My Dailey


STILL Working on a frame up: 1987 Truck body on a 78 Blazer frame. Need cab blasted to start project. Got the cab BLASTED, Now Prep and Paint. Started to lay SOME BONDO and primer. Done, Ordering paint. Got paint, Stuff painted,Cab,Fenders, Hood more later. 9/7/2015 Got the clear coat on,now time to take one off. Started to put things back (What a nightmare) like the heating and AC stuff,inside wire harness, outside AC unit and booster, still more. May 2016, still working on the inside. Got duck work in,heating and AC. Radio (stock) in dash with after market in console later, Speaker are hooked up, Steering column is in. Getting ready to drop the cab onto the frame, Working on engine now since I have the room. Well here it is 2018, got the engine in and it runs, now I need to get the exhaust system in so I can adjust the lifters, to loud right now. Got the exhaust on now I am waiting for the break parts to come in.
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Old 10-03-2017, 10:30 PM   #2
sweetk30
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Re: Gas Tank Size

depth of tank is difference on blazers .

and is that a whole section of frame rail missing inn the pic ?
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77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
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Old 10-04-2017, 01:29 AM   #3
Pontiac1976
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Re: Gas Tank Size

Thinking 25GAL.
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1977 REG cab Long Bed with a 1984 Front Clip, 82 305 .60 over 9.0.1 flat top pistons, 4bbl, TH350, w/84 SS-intake & cam , w/ 1977 big block rad, 1975 gear box, 1984 master w/ metric fittings top & SAE fitting @ portion block, 1975 3.42 gear open diff. Duel 77-87 Factory air cleaner, duel inlet from rad support . Down sized 9' to new 8' Steel flat bed
Was a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change.
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Old 10-04-2017, 06:17 AM   #4
Big Blue
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Re: Gas Tank Size

Thanks, for the info. Naw, just some metal munching rust mites were chewing on the frame. I measured the sending unit, it is 10 and half inches (10-1/2 ) from the rim to the tip of the filter.Thanks again, John
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Big Blue ( John )
79 Chevy Pick up.....My Dailey


STILL Working on a frame up: 1987 Truck body on a 78 Blazer frame. Need cab blasted to start project. Got the cab BLASTED, Now Prep and Paint. Started to lay SOME BONDO and primer. Done, Ordering paint. Got paint, Stuff painted,Cab,Fenders, Hood more later. 9/7/2015 Got the clear coat on,now time to take one off. Started to put things back (What a nightmare) like the heating and AC stuff,inside wire harness, outside AC unit and booster, still more. May 2016, still working on the inside. Got duck work in,heating and AC. Radio (stock) in dash with after market in console later, Speaker are hooked up, Steering column is in. Getting ready to drop the cab onto the frame, Working on engine now since I have the room. Well here it is 2018, got the engine in and it runs, now I need to get the exhaust system in so I can adjust the lifters, to loud right now. Got the exhaust on now I am waiting for the break parts to come in.
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