MotoMatt your Q didn't sound vague at all. I think it will depend on what thickness the sonic checker shows you. I am doing a 360 stroker w the 4" crank and some 1.560" badger flat top pistons and some 50 under rod bearings and some .054" felpros' and I am going to destroke it as much as I can w these bearings ALL to reduce my positive deck height deck so I will only have to mill the pistons slightly (plus notches). A bit different but I'm working with what I have (plus on a budget) and I mainly need more torque in my daily driver 65 dart (I'm getting no respect w the stock 318 ). I'd call your shop & see what they want to sonic check it & if it'll go .130" all you need to do is take your choice of pistons in & tell them to go ahead.