Head rebuild and machine shop questions

[ColtiXim]

Hi.

I have my head at the shop for a rebuild.
4G67 head, light port and polish.
ENGNBLDR EPN valves and bronze guides.
Crower springs and retainers
Ferrea valves seals.
Factory 3 angles valve job.

My mechanic need information for the valves guides height...
I have found 19.5mm on the factory manual.
I need confirmation if is for the both side, intake and exhaust ?

Also i take your informations for a proper head rebuild, 4G6. heads are rare here!
I dont want scrap my head by a bad technic machine shop ...

Big thanks for your help
Remy

 

[Chopstick88]

They are the same.

 

[ColtiXim]

Thanks for this !

Also, i have two Ferrea valve seal kit.
VS1010 Exhaust 6.55 mm valve stem. Viton rubber compound. Hi Temp.
VS1011 Intake 6.57 mm valve stem. Viton rubber compound.

But both package has same blue seals and identical seal size, verified by me on all size faces.
Im curious about the different Ferrea part number ???

I hope use my 264/264 HKS cams after a nice polish job : Camshaft journal problem