"i reject your reality and substitute my own" - adam savage. i suspect my final words maybe "well shit, that didnt work"
instead of perfection some times we just have to accept practicality
you cant run different size rings on a piston they are matched sizes.
you have 2 options get oversize pistons made by a company such as j.p pistons in south aust.
or have the motor sleeved back to a size
it is also possible to get pistons from something else turned down to fit and re-groove them though a set from j.p. is probably cheaper.
as for the feed tube try a hydraulics supplier such as enzed or pirteck they may be able to supply the tubing and fittings if you can get an example to copy.
Have you considered adding a direct starter? My 7U is 43,159 and I know yours has the plate and studs already factory installed. I have a 12V starter and will keep the pony for cold starts too.
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