I've just started porting my 460 heads (D3VE-A2A) tonight, and I've been extra careful not to go too deep anywhere to bust through to the water jacket. I was wondering, if I did happen to go through, are the heads scrapped? Or is there a way to save them?
Basically all I've done this far is completely grind away the thermactor bump down to even with the lowest part of the roof, and also removed the bump that runs across the roof at the base of the thermactor bump. I also ground all the excess off the valve guide boss and also the edge near the valve seat where the factory machined out the hole for the valve. But I am afraid to grind away at any flat surface that doesn't protrude into the port like the bowl and the walls. I checked out the pictures at http://reincarnation-automotive.com/ and they were really helpful, but you can't really tell how much the guy actually ground away in the pictures. Plus, I see a lot of epoxy in the pics, which makes me think he went too far, which scares me, lol!
I guess I should borrow a digital camera and take some pics and show them on here so maybe you guys can give me some pointers. The last thing I want to do is ruin these heads... my brother donated them to me, and he'd already had hardened seats and some other machining done to them, so they are in really good shape. But, I don't want to be taking all this time to do the porting and not get much out of it because I wasn't aggressive enough with the grinder.
Sorry for the long post, I'd appreciate any input (especially from someone who had worked on BBF heads). Thanks
Basically all I've done this far is completely grind away the thermactor bump down to even with the lowest part of the roof, and also removed the bump that runs across the roof at the base of the thermactor bump. I also ground all the excess off the valve guide boss and also the edge near the valve seat where the factory machined out the hole for the valve. But I am afraid to grind away at any flat surface that doesn't protrude into the port like the bowl and the walls. I checked out the pictures at http://reincarnation-automotive.com/ and they were really helpful, but you can't really tell how much the guy actually ground away in the pictures. Plus, I see a lot of epoxy in the pics, which makes me think he went too far, which scares me, lol!
I guess I should borrow a digital camera and take some pics and show them on here so maybe you guys can give me some pointers. The last thing I want to do is ruin these heads... my brother donated them to me, and he'd already had hardened seats and some other machining done to them, so they are in really good shape. But, I don't want to be taking all this time to do the porting and not get much out of it because I wasn't aggressive enough with the grinder.
Sorry for the long post, I'd appreciate any input (especially from someone who had worked on BBF heads). Thanks