V8 Conversion Insformation
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
#3103 Oil Pan (351W) or #3642 Oil Pan (302)
#3125 & 3105 4-Core Radiator with Bracket Kit
#3108 or #3109 Fan Shroud, #3108 |
#3107 Lower Radiator “L” Brackets
#3114 Rubber Engine Mounts
#3115 Motor Mount Brackets
#3160, #3161, and #3162 (351W only) |
 |
V8 Oil Pans
These pans are necessary to clear the differential when converting to a 289/302 or 351W. Both are rear sump pans, and require mods to work with taller-than-stock oil pumps. #3103 contains new pan, pickup tube & screen, dipstick & tube, and main bearing bolt. #3642 doesn’t include dip stick or tube. Shown in blue, comes black.
#3103 351W Oil Pan, $219.00
#3642 289/302/5.0L Oil Pan, $199.00 |
 |
Power Steering, Alternator Adapters
These brackets attach the 302 alternator and power steering pump to the 351W heads. They retain stock 302 mounts and use the same belts and pulleys.
#3160 Power Steering Adapter, $16.50
#3161 Alternator Adapter, $16.50 |
 |
Motor Mounts
6 cyl. mounts must be torched off and these (#3115) V8 brackets installed in a new location. New rubber mounts (#3114) with safety pins are needed to prevent radiator damage from engine movement.
#3114 Rubber Engine Mounts, $45.00
#3115 Motor Mount Brackets, $79.00 |
|
