need help with piston

[fordit99]

Alright so I'm doing a top end rebuild. Cylinder looks good so just gonna hone it. My problem is, I have a 66.675 bored and I'm not sure what size piston to order. Can anyone tell me? Thank you

 

[Awk08]

it really doesn't work like that, the cylinder should be bored/honed to match the excact piston to be used, not try to match a piston to whatever the bore is, not gonna work,
and any reputable shop should know that.
at keast wiseco pistons have the clearence built in, others may not ?
and cast pistons require a different clearence than forged pistons.

this should help explain some of it.............

 

[fordit99]

Well I will bore or hone to match. But what size piston should I order to begin with.

 

[Awk08]

66.75 (.030" over stock) is the next step up from your 66.675 bore right now

 

[Blaaster]

Then be it a cast or a forged piston, hand it to the machinist so that it can be matched to the bore.