Tech advice before doing TTI header install-

Need tech advice from those "who have installed these on A body" . Last time I installed headers was on E BODY, with LOTS of room. Will be installing the ceramic coated TTI's on my '70 Duster. Car has the 727 TF trans., and original 340 engine. No sheetmetal mods-all original body. (Already have the complete TTI exhaust on the car) So, what did ya have to do to install? Were the ATF lines in the way? If so what did you need to do? Have to drop any suspension?