351 ford heads umbrella valve seal

[83Mustang427TT]

Hey guys,

I have a set of 1984 ford 351 that have been ported and polished 3-angle valve job etc. they havent had the guides cut down for the newer style valve stem seals though is it ok to run umbrella type seals for a slightly modified engine?

 

[R2D2]

ya but they suck, if you want to run the good pc seal just buy the cutter and mandrel from someone like dougherbert.com and use a hand drill

 

[83Mustang427TT]

How much would it cost from a machine shop to have them cut the guide boss down to run the good seals? what is the normal size seal for a strip application? .530" I think I read somewhere right?

 

[R2D2]

ya, were do you live? I dont know what a shop would charge cant be much

 

[83Mustang427TT]

Im In NJ