I have a 1981 ford bronco 351 with a holley carbureter ive had her for 10 yrs ever since i had motor pulled out at a ford work shop specialist for motor repairs 2 yrs ago & it came back as a black motor instead of color it was blue & since then hasnt got the power wen i put the gas on takes a long run for her to get up & go im thinking mabe my motor was swaped with another one how can i findout if that was done

you will have to remove the motor, pull oil pan replace crank and change the push rods and cam but if your are going that far why stop for just that little bit you might as well go and pull he heads have them port and pollished add headers and new high rise intake and bigger carb the remove the oem fan and water pump buy a electric water pump and electric fans to mount on the radatior.

In all my experience, if you know how to correctly tune a edelbrock then go with that, but, holley has outstanding carbs that can muster up to an output of 1,200hp. it would be much cheaper to et a rebuild kit from say, o'reillys, 20-45 dollars depending on which one you have.
I have a 1985 Bronco 351w 4x4, i just rebuilt my holley and she runs smooth

No it will not

try auto zone.com they have had most of what i have had to search for [email protected] good luck..DALE

Look behind the motor, next to the firewall. There's a vacuum check valve that keeps the air gulp pump from pressurizing the crankcase. Mine was shot; had the same symtoms. Also, make sure that the EGR valve is closing at low idle.

You don't need an engine light to check the codes. First, do a KOEO (key on, engine off), but, let me tell you, when this happened to me (1986 Full size with 302 EFI, multiport injection) NOTHING showed up. No one, not Ford, not emission specialists, nada, knew the vacuum check valve existed.

By the way; are you getting motor oil in the air filter housing?

with the shorting plug removed at the TFI ignition module the timing is set to 10 BTDC on both engines.

Change plugs & wires, New battery , Install radiator. Crank it over if it starts and is smoking needs new vale guide seals and maybe new rings. But try to get it started first then go from there. If it wont turn over try to turn over by hand from front crank pully with socket and breaker bar to free up motor.

have you gotten an answer for the wiring on your 82 ford bronco w a 351C? i have the same problem putting a 351C into my 81 ford bronco

The Bronco did come with the 5.8L. It's a 351 Windsor though. Ford quit making the Cleveland engine back in '74. You should have a vacuum diagram under the hood of your truck.

Check for timing gear problems. They have plastic teeth on the cam shaft gear which will shatter causing it to jump time.