Neighbor bought my revival...never oiled it. Gave it back. Now I'm putting it in my sprint...I keep hearing the a55 cylinder and head are capable of "performance quality" stuff... shouldn't I take it down to machine shop, bore and mill the head? Have same dude order new piston when I'm there? Or is it worth treats upgrades? IDK how far I can bore oem head before failure...so there we go.