4.3 to 350 swap help

[jl5464]

I have a 87 with a 4.3 tbi. I want to swap the 4.3 with a 350 that I have. The 350 is 78 with a carb. How hard is this swap. If I swapped the carb with a tbi would I still be able to use the same wire harness that is in the truck.

 

[bucket]

Same harness, just different mounts, dizzy, and prom.

 

[GreaseDog]

Yup, all of the sensors are the same, accessory drive will work too, just make sure the rotation of the water pump is correct.

 

[jl5464]

Yup, all of the sensors are the same, accessory drive will work too, just make sure the rotation of the water pump is correct.

Thanks the motor came with a water pump,alternator,power steering pump and all the pullies. I was going get a tbi adapter plate and use carb intake and a tbi distributor. Really did not want to change heads and has a wieiand intake. Just want to make sure I got this I can use the sensors from 4.3 on the 350. Would I have to make any changes to harness or just change prom.