i just finished a 429 swap in a fox body, and i have 2 more waiting in line to do, theres a lot to consider, dont use a t5,we use the 5.o front springs ,sometimes i put a tube cross menber in,and now i use a motor plate in every car,the limting factor is the headers,depending on whos u use or have some made, engine hight is very important,the other thing to think about is
oil pan, we use a c6 trans,and i make my own crossmember also,
and a man rack,when i dont use stock front springs ,i add coil overs to the front,
hope this helps, youlll have a lot of fun with a 429 in there,.........................