350 mag ECU on a 5.0mpi?

[Jayo02]

Was working on the boat today. Still working through some issues I’ve mentioned in another post. I noticed my ECU has a sticker that says 350 mag bravo. I know the engine was replaced in 2013. But I was under the impression it was a 5.0 mpi. Are the ECUs the same for both the 305 and the 350? Or is it possible the engine was swapped for a 350 and retained its cover with the 5.0mpi sticker on it ? I have done a few searches and came back with conflicting results. What do you guys think ?

 

[alldodge]

The 305 and 350 use different fuel tables

Look on the block below the distributor on the ledge for the block casting number starboard side, it should be 8 digits

The port side may have date and cubic inches

Then look you block up
https://www.mortec.com/castnum.htm

 

[Jayo02]

Well alldodge looks like you solved it. Port side on top of block says “ GM 5.7L”. I put some masking tape on it and rubbed it to make it stand out.

been ordering parts for a 5.0. Hope this is not going to be a problem.

 

[Jayo02]

I know I should be happy but now I don’t know my engine serial number.

 

[alldodge]

I would use the same serial number range, just in a 5.7

 

[Jayo02]

I would use the same serial number range, just in a 5.7

Thanks again.