85' mustang 5.0 H.O stock heads????

[Cobra R...anger]

I just bought an 85 5.0 h.o from a mustang, i have been told that the stock heads should not be E7TE's but the bottoms of them are clearly marked as E7's so i figure it is safe to assume that they are. with this, i would like to know, are all E7TE's the same and mainly are mine worth porting, because i want to try it, atleast just to remove the smog bumps and i cant afford to buy aftermarket ones, so if anyone has any site references, information or opinions on this or any other ways of relitively low budget performance ideas, i am very open to hear them, thanks alot
ps. so far i will only have headers and low restriction dual 2.5" exhaust but would like to make this intake and possibly cam work better with this along with porting, thanks alot for any help, sorry about all the questions.