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Boy believe it or not, I did all the work on the intake side to adapt the RB26 throttles and seeing as I had to use the different set of cam caps I cannot find a local shop to tunnel bore the setup. It is just sitting there watching me everyday. If I can get someone to do the tunnel bore for me that would be great help but there is currently no one local or even in the caribbean that does the job :(. I haven't given up hope on the project but this RB26 build is for my S14.5 build that has been ongoing for the past four years, yeah seriously. My ER34 is my daily so wanted to have no downtime or as little as possible by doing everything on a separate head and block and swapping it all over. Still having hope but if I can do a setup like what RIPS did and customize the lower RB25 plenum to have the RB26 setup working then I may go that route but I may have to buy a head locally whenever it pops up. Shipping a head out of country I am sure will be very expensive and I would want to have everything done to it, like replace guides, seat valves, tunnel bore cam journals, test head for cracks and other small things same time. Will let you know how it goes.

Ship the head to Jack Brothers Racing here in Aus. They can do the small tunnel bore. Shipping costs would be minimal (~$500 return)

Is it possible to get an idea of the cost to have it tunnel bored and all guides replaced at minimum? I can look at shipping, with a return cost of $500 it ain't that bad.

Tunnel boring would set you back approx $150-$200 AUD and the rest of the head service including valve regrind etc would set you back approx $500 AUD for them I reckon. Give them a call first though, I know they can tunnel bore 1 inch...well so they have said....but you really need to ring them to confirm first. I have spoken to them about it and they said they could but I never actually got it done as we ended up not needing to.

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