it's going to cost a ton of money to rebuild the 440 adn 727 and get it installed. first let me say this, there is no better hotrod than a bigblockdart, period. this being your first time attempting to install a rb into an a-body it's going to be a patience trying ordeal. please take note of the amount of hair you have before you try it because you will have less afterwards.
this is what i'd recomend, set the 440 and 727 over in the corner and rebuild the 360 and start driving it. we're talking fun here. after that is taking place rebuild the 440 and 727 to pretty good horse power that you want. start collecting all the other parts you're going to need to get it installed. find a rolling a-body drag car and put it into it and then start having some eyeball popping fun at the drag strip.