If you have to do all that I think it would just be easier to get a 660. That way everything is stock and you don't have to worry about any issues down the line. The 064 and 066/660 are pretty much the same saws correct? if so the 066/660 is simply an improved 064. Am I correct in assuming this?
BTW Hi Brad!
Hi Andre Playing with the 064 is fun simply due to the reduced weight. If all you want is the power, then sure, buy a 066/660. I just think its fun to have 99cc of power in a power head that only weighs a few ounces more than a 046. That's all.