you just need to swap the intake and put on a 4 barrel carb.. no need to change anything else. my truck had a stock reman engine in it when i got it and it also had an edelbrock intake with a holley 4 barrel
heres an intake to use...
Edelbrock 3771 Edelbrock Performer Manifolds for Ford
id buy something small for a carb... ~600 cfm 4 barrel holley, demon or edelbrock.