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took my first shot at a shim-under-bucket valve train this weekend.... it was not trivial but surprisingly less difficult than expected. Every single valve was out of spec... and to my pleasant surprise the dealership had the shim sizes i needed, and only charged about $5 a piece.
I fired her up after reassembly and she seems to be running well, we'll see if i got everything exactly right when i beat the bag out of her tomorrow!