I agree .Unless you are set up for it you will end up ordering a reamer from Atlas or Goodson anyhow.Each reamer should only cut about .002 so if its alot of material you will need several.Chances of the stem going in to the proper clearance right off is very slim.How are you measuring this clearance.Ream it too big and you just wasted the new guides.Too tight the valve will hang in the guide, guaranteed.If it hangs up it bends the new valve. This doesent even sart to cover pilots and the way you are measuring it.Now you could use little ball hones but thats sorta defeating the purpose of the new guides.How much meat can you take out with a ball hone?Unless you want to start doing heads alot it just doesnt pay to not let the machine shop do the entire job.I learned about valve clearance the hard way when a valve too tight hung and bent.There is alot to consider on a valve job.Even improper seat width will overheat the valve causing expansion and again; bent new valve.Both seat too thin and too wide.Its money well spend to an experiecned shop.Knocking the guides in and out is the easiest part and if the carbon or rust is built up you can even wallow out the hole in the head too large to fit the new guide.Then you need an oversize OD guide as well.Im just saying that not as simple as it seems.Ive had old motors where the valve itself would not come out of the guide to even start the valve job.Oxy/ acet.If the shop is going to cut the seats they can install the guides for you too.So ask not how much to install guides but how much for a valve job?
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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