"Sweet Pea" 1975 Cheyenne 20

[ShortHaul]

Parts are starting to arrive...

Got my exhaust manifolds in. Went with Summit Brand cast iron, ceramic coated black. Basically Summit's version of the popular Hooker CI manifolds. Paid $280 and they came with the hardware, and exhaust stubs with O2 sensor bungs welded in. Fitment is great. Easy to install, good clearance on the frame, but I'll have to lop the ear off the 4l80e on the driver's side.

Untitled by awesome_adawson, on Flickr

Untitled by awesome_adawson, on Flickr

[Eyegore]

Nice!!!
How would they have fit if it was an AC truck?

[layinrocker65]

Looks great! You are going to fall in love with the truck again once this is done. You have a time line for completion? What gauges are you going to run? Changing the rear gear?

Originally Posted by Eyegore

Nice!!!
How would they have fit if it was an AC truck?

They would fit great.

[ShortHaul]

Originally Posted by Eyegore

Nice!!!
How would they have fit if it was an AC truck?

In terms of the AC compressor? Far as I know that sits forward of the manifolds... but can't say for sure. No AC in the plans here.

Originally Posted by layinrocker65

Looks great! You are going to fall in love with the truck again once this is done. You have a time line for completion? What gauges are you going to run? Changing the rear gear?

They would fit great.

I need to pick your brain on fuel systems! That's been my biggest hang up so far.

Timeline is ASAP. It's parked and taking up valuable driveway space until she's running again!
Gauges I plan to run stock for now. Dakota's are badass I just don't have the budget for it right now. Far as I know the tricky gauge to convert is the speedo
Gears I planned on keeping them stock. I figure the 4th/OD will help me out on the highway.

[Factory Guy]

Originally Posted by ShortHaul

I need to pick your brain on fuel systems! That's been my biggest hang up so far.

Timeline is ASAP. It's parked and taking up valuable driveway space until she's running again!
Gauges I plan to run stock for now. Dakota's are badass I just don't have the budget for it right now. Far as I know the tricky gauge to convert is the speedo
Gears I planned on keeping them stock. I figure the 4th/OD will help me out on the highway.

This link below might help in regards to your dual fuel tanks. All of the parts you need, appear to be on rock auto, the pollock valves I understand now come in an AC Delco box as I guess GM no longer makes them. Just get a 1987 truck year valve, as it was built for the higher pressures of EFI.

http://67-72chevytrucks.com/vboard/s...d.php?t=754061

I am just starting to research all of this myself.

[Factory Guy]

Another idea on your digital speedo:

https://www.67-72chevytrucks.com/vbo...=1#post9021849

[TrybalRage]

Originally Posted by Eyegore

Nice!!!
How would they have fit if it was an AC truck?

I have the same ones in my 85 with factory AC and they fit fine. Tejas mounts in my build.

[ShortHaul]

I posted a thread related to my fuel system conundrum here if anybody has some sage wisdom they'd like to impart...

https://67-72chevytrucks.com/vboard/...d.php?t=829588

[layinrocker65]

Originally Posted by ShortHaul

I posted a thread related to my fuel system conundrum here if anybody has some sage wisdom they'd like to impart...

https://67-72chevytrucks.com/vboard/...d.php?t=829588

There are a lot of ways of skin that cat. I wouldn’t worry about the return rails while running a returnless system. I run a returnless system with 2 efi tanks with a pollock valve to a corvette fuel regulator with a return rail. You just have to cap off the return on the rail which in essence makes it a returnless rail.

When I did my swap 10yrs ago, Holley didn’t have units for the stock tanks. I originally did a walbro 255 pulling through the stock sender with a new return but ended up switching to the efi tanks to get an internal pump. The 255 pumps are really noisy in my opinion. I ran stock gm replacement pumps in the efi tanks. I can’t remember which pumps though. I absolutely hate hearing the wine of a fuel pump.

[Rich84]

The pump is the EP381. 1987 sending unit in a 1987 tank. I can only hear it prime.

[ShortHaul]

Originally Posted by Rich84

The pump is the EP381. 1987 sending unit in a 1987 tank. I can only hear it prime.

Copy. Thanks for the intel.

[ShortHaul]

Got the Trans mounted properly. Stock crossmember, relocated about 5" rear of stock location. Energy Suspension Poly mount, PN 3.1158G. M10x1.5 grade 10.9 bolts into 4l80e tailhousing.

Untitled by awesome_adawson, on Flickr

[Joe Pass]

I figured you went LS when I saw the SB for sale on Craigslist...lol

[ShortHaul]

Originally Posted by Joe Pass

I figured you went LS when I saw the SB for sale on Craigslist...lol

yup… sold that thing quick. Local kid wanted it for his 86 4x4.

[ShortHaul]

Making some progress… got the trans shift linkage all hooked up. Lokar ACA-1800. A little tricky mounting everything up to shift smooth… had to make a few bends in the rod, but overall pretty slick! Also mounted trans cooler and -6AN lines to the trans. Working on mounting the radiator and hooking up the power steering lines next.

[Factory Guy]

Sweet! I think you were wise to do the conversion to the LS, better drive-ability, reliability and the like. I will probably do the same to mine some day, as mine is even slower than yours probably was with a 155hp when new some 50 years ago and now she is starting to burn some oil. So I am just putting off the inevitable.

The old engine in my case will probably just get stuffed in the corner along with the trans, for the future.

Any way I was playing around with my gauges and thought I would pass on my idea for my future Digital speedo. After reading LS171nova write up I decided to try my own for a digital conversion. The stock S-10 digital speedo lines up really well with the stock Squarebody Speedo (as seen in the photo below the S-10 gauge is behind the face of the Squarebody speedo-even to mounting holes line up!). Both speedo's are 0-100mph. The only area that really needs work is in the odometer cut out. I don't know why but Dakota Digital gauges just don't look right to me.

LS171nova link is

67-72chevytrucks.com/vboard/showthread.php?t=512751

[ShortHaul]

Driveshaft re built from Santa Rosa Driveline

Untitled by awesome_adawson, on Flickr

Untitled by awesome_adawson, on Flickr

Also Got cracking on the fuel system... 3/8 and 5/16 to -6an fuel rail adapters from Hot Rod Fuel Hose.

Untitled by awesome_adawson, on Flickr

Bulkhead fitting installed for transfer from aux tank
Untitled by awesome_adawson, on Flickr

Bulkhead inside... filler line will drop right into the efi baffle.
Untitled by awesome_adawson, on Flickr

Working on completing fuel lines and beginning wiring...

[ShortHaul]

So... ran into a bit of a pickle here... 87+ fuel tanks have a 1 11/16th inch opening on the filler tube. The filler neck from 75 is 1 3/8". I can't seem to find a filler hose that has 1 3/8 on the filler side and 1 11/16 on the tank side. As popular as these swaps are, I'm surprised the fix for this isn't all over the web. Chime in with anything you've found...

[SCOTI]

Originally Posted by ShortHaul

So... ran into a bit of a pickle here... 87+ fuel tanks have a 1 11/16th inch opening on the filler tube. The filler neck from 75 is 1 3/8". I can't seem to find a filler hose that has 1 3/8 on the filler side and 1 11/16 on the tank side. As popular as these swaps are, I'm surprised the fix for this isn't all over the web. Chime in with anything you've found...

Look into exhaust reducers. You can usually find them in close enough sizes for a worm-gear clamp & then reduce each end closer to what is required.

[ShortHaul]

Originally Posted by SCOTI

Look into exhaust reducers. You can usually find them in close enough sizes for a worm-gear clamp & then reduce each end closer to what is required.

Ahh yeah… that’d do the trick.

http://www.everyexhaustpart.com/cart...-expander.html

[SCOTI]

Originally Posted by ShortHaul

Ahh yeah… that’d do the trick.

http://www.everyexhaustpart.com/cart...-expander.html

Usually will work as long as you have a long enough straight section for the splice area.

[ShortHaul]

And leave it to ICT billet… they’ve got this nice coupler… goes 1 1/2 to 1 3/4. $16.00 Should do the trick.

[ShortHaul]

Here's some fuel system pics... Got it all pretty squared away.
Off the rail.
Untitled by awesome_adawson, on Flickr

Out the back
Untitled by awesome_adawson, on Flickr

Down the firewall
Untitled by awesome_adawson, on Flickr

Along the frame
Untitled by awesome_adawson, on Flickr

Filter...
Untitled by awesome_adawson, on Flickr

[ShortHaul]

Aux fuel tank with new Spectre sending unit. Ordered a universal transfer pump from Jegs. 12v, 72 gph, 8 psi. $58.xx https://www.jegs.com/i/JEGS/555/159068/10002/-1

Untitled by awesome_adawson, on Flickr

[Factory Guy]

[QUOTE=ShortHaul;9037185]Aux fuel tank with new Spectre sending unit. Ordered a universal transfer pump from Jegs. 12v, 72 gph, 8 psi. $58.xx https://www.jegs.com/i/JEGS/555/159068/10002/-1

I thought, you already replaced the fuel tanks.