will they fit?

the answer to your question is that you would be very lucky to get the manifolds in there comfortably. there just isnt really enough space they will probably hit the inner fenders. your best bet is to keep the fenderwell headers or go with under the frame headers(not sure of the actual name) those might be those schumacher ones keith was talkin about but ive never heard o them either so i dunno, good luck.