Re: Magnum Exhaust Valve Replacement
 

I checked out the auction on those exhaust valves, they are the stock hollow stem sodium filled valves, definitely a weak link as they can snap for over revving. I bought some Cat valves a while back that are the same diameter but with smaller diameter solid stems, only issue is the stems are shorter so I don't think they can be used. I intend to replace the hollow stem valves on my 478M in the future, knowing myself being a lead foot. and the fact my 478M was built up to rev over stock specs!

Re: Magnum Exhaust Valve Replacement
 

Here's what I did. Used Trick Flow stainless valves for 429&460 Ford Trick Flow Heads. Part#TFS54503212 with 13160-8 10 degree keeper and 748-16 Retainer. The valves are.080in shorter than stock,which doesn't cause any problem with the spring and used a 11/16 lash cap on top to add length,part #621-16. Install Bronze valve guides part #VG-7006R . Adjust rockers for stock clearance. Hope this makes sense. Worked for me to get rid of the sodium fllled valves. Dave

Re: Magnum Exhaust Valve Replacement
 

Wonder if the 429/460 valves will work in my 478M because I'm using higher lift valve springs for the custom ground cam, ironically those higher lift valves springs fit Ford 390 applications.

Re: Magnum Exhaust Valve Replacement
 

Really? Just a set of performance FE valve springs? Good to know.