Originally Posted by rubencba
No left the mustang every whier i read siad it be ok or better and yea a tune shop sounds like my only option now
Yeah taking it to get tuned is your best bet then, but be prepared though some of those places that do tuning for this kind of thing charge a lot of money. Good luck.
Also I know of a guy who did this swap, if you are going to do any bolt-ons after this do not do under drive pullies, you will be going through head gaskets left and right.