74 to 65 Drivetrain Swap!

I've been doing searches on this forum and there's too much to information! And my brain is only so big! So I need some help!

I have 65 Barracuda 273 auto. It has a 318 with later model (linkage) 904 trans and a 7¼ rear end with a large bolt pattern. I don’t have much history about this car so I don’t know what all this came out of.

I also have a donor car. It is 74 v8 Duster column shift. I want swap out the good running 340 attached to a 904 trans along with an 8¼ Sure Grip rear end that’s in it.

Can some of you that have done a swap like this tell of anything special I’ll need?

Also how hard is to pull the engine and trans together?


And please no post about needing a stronger drivetrain, I’m on a budget and this going to street driven car so I’m OK with what it is for now