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V8 Conversion Information
If you have a tired 289 or 302 or need more horsepower and torque, the 351 Windsor is the way to go. You may get better mileage with a Windsor than a stock 289 / 302 due to more torque and lower RPM. A 351 Cleveland doesn’t have enough low range torque for four wheeling. Clevelands require very expensive custom radiator, headers and exhaust. Hard to find 100+ octane gas is also necessary. So, unless you intend to drag race at 5,000 to 8,500 rpm, a Windsor will out perform, out pull, out climb, and get better mileage than a Cleveland.

A 69-70 2V or 4V Windsor is best, a 4V having 10.5:1 compression or a 2V, 9.5:1. Before you swap, see if the 351 has a 3 bolt harmonic bal-ancer. If it has a 4 bolt, you’ll need a 3 bolt harmonic balancer for a 69 Windsor. If you can’t find a 3 bolt, you can use a 302, 3 bolt balancer by re-marking the timing marks. Reuse your 302 water pump, pulleys, belts, etc. using the power steering adapter bracket #3160 & alternator bracket #3161.
The 351W rear main is larger, so the stock 302 pan won’t work. An Oil Pan Kit, #3103, is needed to clear the front differential. Most Windsors have the sump in front which is bad for four wheeling. Your engine could run out of oil as you’re climbing a hill! Our pan has a rear sump. Even with this pan, to avoid damage, your Bronco must be lifted 2- 3 1/2”.

To complete the conversion, our Headers are designed to take into consideration the extra 1 1/2” height of the heads. They don’t rub the firewall and if you need to remove the starter, you can leave our headers in place. CAUTION: Don’t try to use your 6 cyl transmission with the V8. There are several problems and it’s not strong enough to handle the power.

SWAPPING A 6 CYL FOR A 302 / 5.0L OR 351W: YOU'LL NEED:
#3100, or #3102 Headers
Oil Pan (351W) or Oil Pan (302)
Radiator with Bracket Kit
#3107 Lower Radiator “L” Brackets
#3114 Rubber Engine Mounts
#3115 Motor Mount Brackets
#3160, #3161 Adapters (351W only)
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2-1 Early Bronco Exhaust FAQ
2-1 Exhaust FAQ

Frequently Asked Questions-

What comes in the kit?
Driver & Passenger Head Pipes, Y Pipe, Mid Pipe, Tail Pipe, Muffler
Long Rubber Hanger, 1 each Long & Short L Brackets, 2-2.25" Exhaust Clamps, 4- 2.5" Exhaust Clamps, 2-2.25" Stainless Band Clamps, Hardware & Grommets, Donut Gaskets for manifolds (#3061 kit)

How do I know which options are best for me?
Click here to watch Monster Mike walk you through the options and accessories
No two Broncos or Bronco owners are alike, so we made this kit customizable to better suit your individual preferences.

What header finish should I choose?
Click here to watch Monster Mike walk you through header finishes
  • Black painted for a tight budget, no heat or rust concerns or if you'll need to customize.
  • Stainless for show quality good looks, no heat concerns or customizing.
  • Ceramic finish or show quality and best heat reduction in engine bay. The most durable hi-temp finish available

What muffler is best for me?
Click here to watch Monster Mike walk you through the muffler choices
  • Jones Full Boar- Classic Flowmaster 40 Series sound for budget pricing
  • Flowmaster Delta Series-Great Flowmaster 40 Series sound but without the drone
  • Cherry Bomb Pro- Agressive Deep Tone for that deep lumpy sound
  • MagnaFlo- Mellow Deep Sound that really wakes up at high RPM's
How long does this take to install?
A weekend is fairly standard for most home mechanics. Please read install instructions to see if you are comfortable with what is required.

Can I do it by myself?
Yes, but having a helper is nice when hanging the tail pipe.

What tools are needed?
Cordless impact drill, 17/64 drill bit, tape measure, silver or white paint marking pen, 3M green tape, 5/16", 3/8",1/2", 9/16", 5/8", 11/16", 17mm, 19mm wrench and socket, hack saw, cut off wheel or vertical band saw, rubber mallet, vice with pipe or soft jaws and two jack stands to hold up muffler & tailpipe during mock up.

My pipes don't fit together, what should I do?
Pipes are a very tight fit so they don't leak. Check for burrs and check pipe ends for damage. Call us if you need help!





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A special high-temp joint sealing compound that is resistant to corrosive exhaust heat and gas. Fuel injection systems require the elimination of all exhaust leaks for proper operation and this does it! Applies soft so it can be forced into small openings, cracks, joints and 02 Sensor bung welds. Sets like a weld. Direct heat rating of 1000° F and intermittent temperatures to 1500°F more info
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Power Steering Adapter Bracket, 351W 1966-77 Classic Early Ford Bronco V8 Conversion
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Our Price: $16.50

This bracket attaches the 302 power steering pump to the 351W heads. They retain stock 302 mounts and use the same belts and pulleys. Shown with 3161 Alternator Adapter.


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Alternator Adapter Bracket 351W 1966-77 Classic Early Ford Bronco V8 Engine Conversion
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Our Price: $17.95

This bracket attach the 302 alternator to the 351W heads. They retain stock 302 mounts and use the same belts and pulleys. Shown with 3160 Power Steering Adapter.


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Ford EFI Bracket fits 1986-93 Ford 302 and 351w fuel injection systems that have installed the Mustang EGR spacer.This stainless bracket mounts in the stock location for easy installation of the Lokar Kickdown Cables and Throttle Cables. This uses the #2342 Cable. Does not fit BAP throttle bodies. Available in Polished Stainless or Black Stainless.


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For decades, people have been securing the air cleaner to a carburetor with a wing nut. Spinning it on and off is slow and often results in dropping it! Replace it with a specially designed mini latch that is a perfect finishing touch to custom build. Requires modification to the air cleaner to fit the latch button. Will not work on stock carb without mod. Diameter of latch: 1.23” stud: 4.125”
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Ordinary Header bolts can be a real pain to keep tight due to the expansion and contraction that headers go through. No one likes getting in there and busting their knuckles if they don’t have to. We swear by these (not at them)! They use a patented locking system that won’t come loose. more info
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