shifting problems

man i bought car from told me he replaced original 6 cyl with 318 and trans from dodge truck and a kickdown lever or rod hit underneath so they left it off i have been under the car but i cannt tell any thing is wrong could you point me in the right direction to see a pic of what im supposed to look at thhanx for all help im trying to do what i can by myself but i dont know what i am looking for also the truck was a 78 or 79