What year will work?

[BC boy]

If I buy a early bronco with a old 302, which year 302 or 351's would work to replace it. The bellhousing's are the same as far as I know, are the motor mounts the same aswell?

 

[Skuzzlebutt]

Any year of SBF will fit the same.
When they switched to hydraulic clutches ('82 maybe) they stopped drilling the hole for the clutch bar bracket.
They changed the balancing of the motors in the early '80s so you cant use older flywheels & dampers on newer motors.
Size andshape of the flywheels varied a bit over the years. They all will bolt to any motor but may not work with certain torque converters, clutches, starters, & bell housings.

 

[Unregistered]

Thanks, If I found a complete efi motor I should have no problems. Also would the AOD trans be the only way to get both high and low gears for offroad and for highway. Or did any manuals come close to the ratio spread? Was there only the 3 sp stock?

 

[Skuzzlebutt]

Broncos never came with ODs but there are some manuals OD that will swap in easier than an AOD.

 

[BC boy]

Duff has a adapter and a shifter for a top cover 4 speed trans switch. I think is the way I will go, what vehicles did they come in? Would a car trans work or only a truck.

 

[BC boy]

Thanks for the help guys! I found the trans info section on here and I got most of the info I needed. I apreciate the input, hopefully I'll get a start on my project bronco sooner rather than later. Sean

 

[critt77matt]

they say a 69 is the best flowing (pre-smog) 351W