will i need a tune?

i can get some 351w heads, e-cam, f-cam. pretty cheep. if i ported the upper intake and a lil head porting, with all this stuff, what else would have to be done? im not trying to destroy my engine.

can i install this stuff safely, have it run properly, and not need a tune? ireally wanna keep my fi. wont the computer compensate if its running too lean/rich?

by the way. its a 92' t-bird engine/computer. (sn-style i believe)

so i wouldnt have to upgrade anything else, like injectors/tb that sort of thing? i thought i did. and i thought if i did i would have to tune so the computer knew i was now running bigger injectors/tb...exc...