[alexiskai]

Originally Posted by Jim Brierley

Modern, straight guides are always a tight fit, they need to be. I installed a set for a friend a few years ago, one guide was not as tight as I liked it to be, I used Loktite to be sure. Fast forward several months and the engine had another, different, problem. When torn down, that guide had slipped downward at least 1/2"! Since that incident, I buy guides from Mac's. they are 1-piece but have a shoulder for the spring to seat on, so the spring holds the guide in place. Another advantage of them is that you don't loose the length of the stock guide/spring relationship, so no loss of spring pressure.

These ones?
https://www.macsautoparts.com/ford_m...iece-type.html

Mike's also sells them
https://www.mikes-afordable.com/product/A6510MODA.html

Very interesting that none of the other vendors sell a one-piece with a shoulder. I assume the tight fit everyone is talking about eliminates the need.