258 cylinder head question

[SarTech]

Hello Jeep fans,
Im rebuilding a 76 JC5, we have completed the frame and running gear and now starting on the engine. The engine has 53,000 miles on it and has sat for the last 12 years. I plan on putting in new rings and bearings but my question is about the head.
Can I lap the valves and put in new valve seals and be good to go, or do I need to have the head rebuilt with new valve guides due to todays no-lead fuel?

I appreciate any suggestions and guidance.
Thanks much.
Pat

 

[Jimbos76cj]

Lap the valve and replace the seals.. No need to have them machined

 

[IOPort51]

check for cracks between the valves. AMC 258 i6 / 4.2l heads like to crack there. you are pretty low miles so you should be good but when you have it cleaned up with the valves out it would be a good time for a Die penetrant test.

If you have never done one it is not hard.

AIM School- Dye Penetrant Test - YouTube

 

[SarTech]

IO and Jimbo thanks you the replies. Im going to lap the valves and replace the seals.
IO thanks for the suggestion, I am familiar with dye pen I did a lot of NDI back in my A&P days.