1973 dodge dart swinger and 400/727

ok guys and girls lets hear some tips and tricks to this install...i have a 73 dart and plan to put a 400/727 big block in to it..i plan to go to manual steering and do away with the power stuff.. i plan to use the motor mounts from shumacher(think thats right) ....i would like to put some cheap headers on this ..its going to be street and raced from time to time and have a shot of nos on it later down the road...what do i need to look out for doing this install?????any pointers or tricks you guys can come up with will work for me...for right now i plan to run the motor just as it comes out the other car so i can get it going and collect some other stuff down the road....small cam,rockers,and a intake....8)