Squarebody Blazer Gas Tanks - Differences Through the Years

[Lov-2-Rev]

Hey all!

I'm looking for a little tech info from someone in the know.
I am going to swap the saddle tank in my 84 C10 for a rear mount from a K5. The truck is still carb'd and I'm looking at a 25gal tank. However, in LMC's K5 catalog there is a part number change from 81 to 82, even though the physical dimensions are identical (PT #'s 32-5943, 32-5944). Can anyone tell me the difference between the early and later versions of these carb-feeding fuel containment units?!

Thanks!

 

[Lov-2-Rev]

Oh, and before anyone suggests...I already tried. LMC's "tech" dept was as usless as tits on a bull.

 

[Bent77]

Can’t help there. But you’ll get to the mounting of the tank and filler neck here soon

Is a 87+ TBI tank a comparable price?
You never know when fuel injection will show up. Having a baffle tank may save you money later if that is the case

 

[sweetk30]

and rockauto is around the best place for lots of pics of parts and most prices on quality name brand stuff . all tho i have found my spectra premium tanks and senders cheaper on ebay the last few times .

i think the swap in part #'s was for the filler neck size of the tube and possible move the vent hose to the sender over the tank maybe . i am not all o familiar with blazer tanks .

and as said if swapping in the tank new and never know if going efi i would get the tbi spec tank / then later you just need to swap the sender for the tbi spec unit and use a acdelco ep381 pump for up to 60-70 psi spec to feed most aftermarket kits . ..... but by the looks of it the blazer tanks for tbi / efi are only offered in 31 gal capacity so this shoots out that idea .

 

[frankin5]

Correct me if wrong, 69-72 filler on drivers side, 73-91 on passenger side

 

[wazzabie]

I don't know if they are still made in canada... but go with a spectra. The one I good is nice.

 

[Lov-2-Rev]

Mounting the tank wont be too big of a deal, and I have the filler neck sorted out already.
The truck is staying carb'ed. I like the absolute simplicity of my rig, so a tank with EFI baffling isn't necessary.
I'm just looking to know if anyone can tell me the specific difference between the 2 tank options.

Thanks!

 

[sweetk30]

well like i said i think its the filler neck size for the hose .

1981 k5 25 gal https://www.rockauto.com/en/moreinfo.php?pk=17416&cc=1029541&jsn=446

1982 k5 25 gal https://www.rockauto.com/en/moreinfo.php?pk=17417&cc=1029585&jsn=546

look at the pics and you can see the 82 has a bigger end . i cant say for sure there is other tiny tweeks but this looks like it .

good luck on the project . and post up some pics if you would . be neat to see how others do it .

 

[mickeykreg]

When I was doing this I ordered the tank I suspected I needed through Advance Auto online. Spectra tanks from Canada. Theory being if it was wrong I could return it locally and go again.
Good luck, Mick

 

[blazer74]

81 and down Blazer 25 or 30 gallon 1 3/8 filler.
82 and up Blazer 1 1/2

 

[Lov-2-Rev]

Thanks a million, guys!

I'm going with the later version. The larger dia. inlet should make for a smoother fill, especially over the long flat pitch of the hose needed to make this work.