you should do all guide work in a head shop or end mill. running the reamers by hand or with to much pressure will distort the guide, and will not being straight with the seat.
92 F350 CC SRW,7.3 E4OD 4x4 4" lift 35" tires, 4.10, 4" exhaust straight pipe,
ATS nwg turbo, rebuilt and balanced, holley red, new IP & injectors, rebuilt heads by me A pillar triple pod, auto meter phantom gauges,
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What Itaylor said. Installing guides has to be done in an automotive machine shop. In the truck shop I worked in, we had a high-end valve grind setup with the correct reamers to ream sloppy guides very accurately, however then you had to have all new valves with oversize stems. But when it came to drilling out and installing new guides, the heads had to go to a machine shop with the proper equipment.
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2001 Excursion Limited, 4x4, toreador red, 4" turbo back exhaust, DYI Tymar intake
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