Magnum Swap Transmission Options

@TrailBeast thanks for the info! Overdrive does sound like a nice addition. I'll have to do some research on that.
@Bobzilla As for "better" I simply mean shifting response and drive- ability.
The 904 does sound like a great option for my build. From reading on here it seems that all I would have to do is swap to a V8 center link and maybe get a rear engine mount crossmember. Is this correct?