transfer case swap??

not sure if i should post this here or in trans section but here goes. i have a 86 bronco with a very tired 351w and c6.i just bought a freshly rebuilt 72 lincoln 460 and c6. will the transfer case from the smallblock c6 swap to the bb c6? and what's involved? a buddy of mine had an od big block trans with a transfer case on it and he was putting it into a 2wd truck. to take the case off and put the 2wd tail on the trans shop said he had to change the main shaft and all kindsa stuff.i am hoping i can just unbolt and rebolt..

thanks for any info.