quote:Originally posted by Rocky:
Is the cracking on the top of the heads a serious issue? Couldn't he press / machine out the guides, and then remove the thin cast material? I can't see how that cast housing adds A LOT of strength.
I would be worried about the cracks inside the port, though. I wouldn't want a chunk coming off the intake side.
I'm just asking, to trying to learn.
Thanks.
Rocky
The person who did these guides has no idea what is required to do them right.
What I am trying to get is current availability of the solid manganese-bronze guide.
It is .502" od. To install them, you machine off the rest of the top of the cast iron guide that "the other guy" left. (Must be a Community College shop class graduate?)
Then you bore the guide hole to .497 and then hone it to .499. Then you press these in from the top until the shoulder stops it.
The top has a ridge so it can't slip through. The seal sits on top and you trim the length in the port to where you want them.
Easy-peesy!
The guy who sells them is Ted Standhope, I believe and email him at
engnbldr@engnbldr.com
Here's a picture of one of my spares.
This one is for a 427 Ford. The one for the sb Ford is the same except for the valve stem hole of 5/16". This one is a 3/8 stem.
These are the same guides that Edelbrock and Trick Flow use. As far as I know, he supplies them from what I understand but it's been awhile since I bought these?
If he doesn't have them, TFS has the same ones. You can get them there or even from Edelbrock.
They are so simple to do you can do them yourself in your own shop.
