I have read a few posts online from some folks who made the above small upgrades to their 2BBL 318. While the consensus is that you will gain some power, there has also been some posts concerning a drastic decrease in mileage. A few mentioned wanting to go back. I suppose my question is who out there has done these mods and come to regret it and wished to go back? Is there a primary reason you chose to do so? Thanks in advance
