Originally Posted by fast68plymouth
4 options:

- wait til they’re available

- turn down a .502 guide

- ream hole in head to .500, use a .502 guide

- put a liner in the old guide

When I was messing with those heads on a semi regular basis....... if they needed guides(most did), I made them so I could use .502 guides.



Yep. I always do option 2. Even on new stuff like W5 heads. I junked the original seats a guides because they were so crappy.

Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston