251 to 230 engine swap

[MBF]

I’m going to go through the 251 in my B2JA.  I’ve got a good running 230 that is ready to bolt in.  How much of a deal is it to make this swap from the longer to shorter block?   I want to take my time on the build and of this is a fairly easy swap I’d rather not keep the truck down.  Will the 230 bolt to the bell housing on the 251 so that I can leave the 5 spd?  I know the exhaust is different, but I’ve got a complete setup for the 230.  Thanks folks!