the e cam should help you out a bit, it will not hurt your gas milage much, if any... a friend of mine swapped to the e cam and he has stock heads, all he did was change his headers and exhaust, the improvement was unreal... he has stock heads, on his and even with those the cam helped him... people tend to say stick with stock, if you have stock heads, but the e cam is just a little bigger than stock, so it will work great especially if you have opened up the heads a bit... i say go for it, and i know he will too...
Phantom
------------------
Project Bird Turd
Loose Cannon Racing
Scarzi Machine Works