Posted by Drew M. on Friday, November 22, 2002 at 9:16AM :
The VPW NOS valve guides I received had an i.d. to small for the valves. I guess this is why the manuals say to reem the guide bores - 0.345" for exhaust I believe. I was unsuccessful finding a straight reemer in that size so I converted it to inches: 11/32". It is a perfect size to reem out the guides.
Guides are not too hard to replace - just don't drop a valve keeper into the oil pan after removing it like I did:)
-Drew M.