1981 Ford Bronco
Owner: AbandonedBronco         (All of this user's registries on SuperMotors)
From: Boise, ID, U.S.A.        (Other registries in ID)
Year, Make, & Model: 1981 Ford Bronco        (Other Ford Broncos)
Avatar:
Nickname: Spartan
Mileage:
Engine: 300 Inline 6

4 barrel 1848 Holley 465cfm carb with a dual port Offenhauser performance intake.
Dual fuel injection 4.9 exhaust manifolds out through a single 2.5'' exhaust with a high flow cat and muffler.
Drivetrain: 4spd NP-435
9'' rear and a 3.00 final drive.
32'' BFG A/T KO2
Notes: The Bronco was abandoned at my girlfriend (now wife's) father's ranch since it didn't pass California emissions (and wouldn't start) with the promise of ''I'll pick it up next week.'' Four years later, it hadn't moved.

He gave it to me if I could get it running, so I did some work and drove it 700 miles home to Idaho. My first Ford, my first truck, and my first 4 wheel drive.

Since then, I've put 45,000 miles on it, rebuild the entire suspension, brakes, transmission, drive train, and have turned the slouch old tired 300 into a powerful and fun torque monster.


No idea how many miles are on it. Pulled the original engine and it had been rebuilt once already and had since then worn out past 60 over. 400,000? 600,000?


Edit: Sadly, the '81 has gone to the great car heaven in the sky. It was totaled in 2017 by some driver on their cell phone. Moral of the story, Don't text and drive!
Last Updated: 4/26/2022
Hits: 61208
Album
Folder Hits Comments Created Updated
folder Four barrel conversion440068,14703/23/094/18/19
    folder O2 Sensor Install2021,648011/17/092/15/14
    folder Extra pics16008,03506/10/101/18/13
    folder Underside Intake Heat18005,32004/7/134/7/13
    folder Holley 80555670016,72309/13/1311/11/14
    folder Holley 184838005,79101/23/1510/5/15
    folder QuickFuel BD-45040005,26208/11/164/25/18
folder Exhaust Upgrade210029,97003/26/092/11/11
folder Random Pictures27007,51403/27/0911/30/15
    folder Videos0022,87206/29/097/13/10
    folder Camping Trip 2009290010,86109/14/099/18/09
    folder Off-road Outing 22007,82506/3/106/18/10
    folder Camping Trip 2010320012,35707/19/108/9/10
    folder Crossflow Head4001,004012/20/1412/20/14
    folder Camping 201750033708/7/178/7/17
    folder Backpacking 2017300226012/1/1712/1/17
folder New Tires23008,24701/22/1011/30/15
folder Technical400010,06204/7/104/10/18
    folder Wing Window19006,18801/24/114/26/22
    folder Intakes6003,82608/23/112/20/12
    folder Floor Repair310010,120011/5/1111/8/11
folder Cam Install1060055,168011/6/107/24/12
folder Headwork460020,38702/2/1110/25/12
folder Engine Swap410013,48805/2/1110/4/12
folder Saginaw Swap740013,73104/16/122/21/19
folder Engine Rebuild19005,46306/25/1210/3/12
    folder Second attempt3780022,76402/1/162/5/19
        folder Roller Rocker Arms20001,55308/17/179/21/17
folder NP435 Swap960029,095010/4/1212/21/12
folder Ignition9001,30802/11/158/9/16
folder Engine Pics8001,12203/2/153/2/15
folder Warn Hub Diagnostics21002,40203/2/153/17/15
folder New seats19002,39305/14/155/14/15
folder Weatherstripping38004,161010/26/1511/2/15
folder New Door Pins12001,316011/12/1511/12/15
folder Bronco Pics740023,149011/30/156/10/19
    folder 1984 Bronco530018,75008/2/1011/30/15
        folder For Sale Pics32004,206010/6/1510/6/15
    folder Collision Damage90072609/16/1710/2/17
    folder 1985 Bronco400256010/11/1710/11/17
folder Headlight upgrade16001,96301/18/162/14/16
Newest Media Files
Instrument Cluster Plug 14pin.jpg
139 hits | 19.91 KB | Posted: 4/26/22

Instrument Cluster Plug Wiring for 14 pin plug (warning lights)
Instrument Cluster Plug.jpg
126 hits | 21.36 KB | Posted: 4/26/22

Instrument Cluster Plug Wiring for 18 pin plug
2015-03-06 18.15.27.jpg
127 hits | 77.04 KB | Posted: 6/10/19

2015-03-06 18.15.27.jpg
89 hits | 77.04 KB | Posted: 6/10/19

2015-03-06 18.15.46.jpg
117 hits | 58.25 KB | Posted: 6/10/19

2018-10-24 15.51.32.jpg
126 hits | 46.86 KB | Posted: 4/18/19

2018-10-24 15.51.22.jpg
114 hits | 43.21 KB | Posted: 4/18/19

2018-10-24 12.27.36.jpg
120 hits | 56.67 KB | Posted: 4/18/19

2018-10-24 12.27.07.jpg
98 hits | 56.7 KB | Posted: 4/18/19

Most Viewed Files
Engine Bay.JPG
5479 hits | 82.67 KB | Posted: 3/23/09


Here's a shot of the mostly stock engine bay. The only thing in this picture that isn't completely stock is the EFI 300 exhaust manifolds. It's time to dig in.


0829081417-00.jpg
3080 hits | 44.85 KB | Posted: 3/26/09


These pre-shaped pieces showed up in the mail. The fact that the tailpipe was made specifically for the Bronco and the Y-pipe for the EFI manifolds on a straight six really saved me time and money.


Offenhauser Intake.JPG
2901 hits | 78.54 KB | Posted: 3/23/09

The new aluminum Offenhauser dual port intake.


New Intake.JPG
2875 hits | 73.7 KB | Posted: 3/23/09


Here's the new intake in place.


Intake Removed.JPG
2626 hits | 77.76 KB | Posted: 3/23/09


The intake removed giving a clear shot of the dual exhaust manifolds of the EFI 300. MUCH better than the restrictive six-to-one stock 1bbl exhaust manifold. I thought about painting those when I put them in but I didn't want the rest of the engin...
With Heat Spacer.JPG
2463 hits | 74.69 KB | Posted: 3/23/09


The intake with the heated spacer. This particular spacer is designed to run coolant underneath the carb to prevent it from icing, especially in the winter.


Hooking the lines up.JPG
2298 hits | 78.68 KB | Posted: 3/23/09


Everything's in place, the lines are hooked up, and it's ready to go!


The Final Touch.JPG
2255 hits | 82.99 KB | Posted: 3/23/09


Putting on the last, and final touch after we tuned it. It is time for a test drive.


Accelerator Bracket.JPG
2237 hits | 68.06 KB | Posted: 3/23/09


The custom made accelerator bracket. Cost about $6 for the steel.


Maintenance & Modification Logs
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