My 1976 Jimmy with a 5.3

[1tonjimmy]

I just finished up a GM 5.3 swap into the truck and I replaced everything from the fuel tank to the fuel rail on the motor with new parts. The fuel system is all plumbed in -06 Aeroquip socketless hose and -06 socketless fittings. I replaced the tank with a brand new tank and sending unit for a 1991 Jimmy and put the pump in the tank. I used a Holley/Walbro 255 LPH in tank pump and a regulator/filter from a 99 to 03 Vette. I am the 4th owner of this truck and this truck is an original Arizona truck so there is very little rust on it at all.



















Specs :

Dana 60 front
Lock Right
1/4 Diff Cover
4:56 gears
New rotors, calipers and studs
New Wheel bearings
King Pins reworked
2.5 inch BDS front springs
ORD HD grease able shackles
ORD sway bar dico
ORD Steering box brace

14 Bolt rear
Detroit locker
4:56 gears
1/4 Diff cover
U joint / yoke rock guard
Rear disc conversion
New bearings and seals
shock mounts moved
axle perches moved
4 inch BDS rear springs
ORD HD grease able shackles

Built TH400
6 bolt round adapter
6 bolt round NP 205
New bearings, gaskets and seals in the NP 205

New 17X9 Pro Comp 1069 wheels with new 36X13.50X17 Irok bias tires. The tires have 27 miles on them and measure out the same as a 37x14.00X17 Irok which is 36.8 inches.

Hydoboost brakes

The inside of the tub has been Line X'ed

3000 watt continuous 6000 watt max inverter

New 31 gallon fuel tank with skid and very nice rear offroad bumper

Coated Street and Performance headers for a 5.3 swap into a 1973 to 87 GM Truck with a single Dynomax x flow muffler and no cats. The truck sounds great

New Taylor 10.4 wires, Taylor plug boots and with Bosch Platinum plugs

Flushed out the engine when we swapped it in and all I have ever ran in the motor is 5W20 Royal Purple oil.

[1tonjimmy]

Here is a few pictures from when we dropped in the motor.

Picking up the motor from the dock...



The Jimmy getting ready for the 5.3 swap.








Pulled out the old tank and put in a new 31 gallon EFI tank with a sump and a in the tank fuel pump. The pump I used is a Holly 255LPH which was dumb on my part because it is nothing but a $100.00 in the tank Walbro pump I guess you live and learn. I also replaced the old fuel sending unit with a new EFI sending unit. All the fuel plumbing is going to be done in -06 Aeroquip Socketless hoes and -06 fittings. I am also using a Vette regulator and filter comb from Pace Performance with -06 fittings as well. I replace all the old straps to hold the tank in the truck and put on new anti squeak material.



We trashed all the old exhaust and I will be going with some mid length headers and a Magnaflow x pipe muffler.




My buddies 7 year and the head mechanic on this job.




New home for the 5.3



Checking all the clearance



And it is in...

[67C10BUB]

Very cool. How does it run?

[harnalien]

Looks very cool and clean. I'm also interested in how it runs.
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[1tonjimmy]

The truck runs great IMO the new GM motor is the way to go for motor swap. The old school SBC is an out dated dinosaur plus the new GM motor swaps are so eazy once you have done one and know what not to do on the next go around. I want to do a beater C20 with a healthy 6.0 6L80 next.
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[Clyde65]

Very nice! I bet the swap was a little difficult being the Jimmy is so tall!

[1tonjimmy]

Originally Posted by Clyde65

Very nice! I bet the swap was a little difficult being the Jimmy is so tall!

Not at all..... Just let the air out of the tires. There is more then one way to skin a cat.





Note: No cats were harmed during this engine swap...

[Pop's C-10]

I've read you have to use a spacer or adapre of some kind to bolt a LS up to a 3 speed..how did you go about it..

[1tonjimmy]

Originally Posted by Pop's C-10

I've read you have to use a spacer or adapre of some kind to bolt a LS up to a 3 speed..how did you go about it..

The Th400 will bolt up to the GMIII and GMIIII just fine. I used this along with this flex plate. I had to elongate the holes on the flex plate a little but it works fine.

[Clyde65]

Nice! I like ur Jimmy.
Many companies supply the flexplate to connect a 3 speed, TH400 or 350 to an LS. Transdapt is one I believe, you can also get one from GM too.

[1tonjimmy]

Or just use the factory flex plate depending on which one you have. The flex plate is not the problem the main thing is the pilot for the snout of the Tq converter.
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[68GMCCustom]

Sweet Jimmy! Nice work on the LSx swap too!

[1tonjimmy]

Originally Posted by 68GMCCustom

Sweet Jimmy! Nice work on the LSx swap too!

Thanks man it truly is a blast to drive.
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[y5mgisi]

Are you still thinking about selling it?

[conman585]

what engine mount brackets did you use?

[1tonjimmy]

Originally Posted by Pop's C-10

Thanks for tha info

No problem man!

Originally Posted by TR65

Oneton,

Great truck, great swap! Thanks for sharing.

I'm a dot5 man myself.

TR

Thanks bro!

Originally Posted by y5mgisi

Are you still thinking about selling it?

Like I said if they got the money I got the title...

Originally Posted by conman585

what engine mount brackets did you use?

Street and Performance LS motor plates with these motor mounts. You will need to get the S&P plates that move the engine one inch back.

[Pop's C-10]

Thanks for tha info

[TR65]

Oneton,

Great truck, great swap! Thanks for sharing.

I'm a dot5 man myself.

TR

[68GMCCustom]

I'm about to finish my completely new brake system. What are the +/-'s of going DOT5?

[1tonjimmy]

Originally Posted by 68GMCCustom

I'm about to finish my completely new brake system. What are the +/-'s of going DOT5?

Withstands heat better, does not remove paint, and you get to put DOT5 only on your brake reservoir.

[TR65]

Originally Posted by 1tonjimmy

Withstands heat better, does not remove paint, and you get to put DOT5 only on your brake reservoir.

What 1ton said plus it doesn't attract and absorb water. The paint and corrosion thing is what I do it for. It just isn't right to have an operating fluid ruin your paint with one drop. It is good stuff.

TR

[Pop's C-10]

You got anymore pics of your gauge set-up

[1tonjimmy]

Originally Posted by Pop's C-10

You got anymore pics of your gauge set-up

It is not the most pretties thing in the world but it works...









I also replaced the turn signal indicator and hi beam indicator with l.e.d lights.

[Pop's C-10]

Originally Posted by 1tonjimmy

It is not the most pretties thing in the world but it works...









I also replaced the turn signal indicator and hi beam indicator with l.e.d lights.

That is a nice set up..

[conman585]

1TON, love your K5

Any more info on the hydroboost setup. Follow any plans? What components did you use?