Which heads for stock motor?

[SlowStang2]

Do I have to buy seperate parts for TFS heads to fit on my motor? Do they just go right on without additional parts? Reason I ask is I read a seperate post on here concerning the same thing and there were replies stating that trick flows are a better buy than edelbrocks but you need, I think rods(?) or else they won't fit or something will break or something stating that the stock parts conflict with the trick flow heads. I can't remember the details or what the title of the post was, but it was something to that nature. Thanx again everyone.

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94' Stang GT Convertible Cobra upper&lower, Mac cold air w/K&N, Full exhaust, 3.55, etc. 14.4@100.