hmm little confused on the measurements.
the 2618 instructions says i need at least 0.004" clearance (0.1016mm) for a turbo.
a 71.396mm bore means the piston would have to be bout 71.193mm, smaller than what i measured.
his first conversion was bout 71.5mm which required a piston of 71.3mm which is close to mine.
but anyway, i'll wait till he sends the job sheet to make a proper calc
