After a bunch of life happenings, I'm back. The scope of the project will have to downsize, so for now I will have to settle for heads, intake and headers. I can squeeze another year out of the 390 short block.
A few months ago I removed some broken bolts from the upper exhaust flanges. A few of the holes we're really ugly. Bolts rattled in the remaining threads. 2 of the holes had been drilled by the previous owner(s) and tapped 1/4" off center. The remaining pieces of broken bolts were left in and tapped.
![Shocked :o](http://fepower.net/simplemachinesforum/Smileys/default/shocked.gif)
What a mess! So I made some threaded sleeves with 9/16-12 threads on the O.D. and tapped 3/8-16. The off center holes were plunged thru with a end mill and tapped 9/16-12. Now the holes are back on center!
![](http://i1207.photobucket.com/albums/bb462/kmccullah1/GrandJunction-20130104-00166_zps45c73368.jpg)
I dimpled the threads with a center punch for an interference fit and installed the sleeves with a bolt and a jam nut, leaving a 1/16 or so standing proud for milling.
![](http://i1207.photobucket.com/albums/bb462/kmccullah1/GrandJunction-20130104-00167_zps71971efa.jpg)
I milled .020 off of the exhaust flanges and still had some ate up spots.
![](http://i1207.photobucket.com/albums/bb462/kmccullah1/GrandJunction-20130104-00168_zps2e5ccf96.jpg)
It would have taken .060 to make that flange pretty. Will use some high temp pooky on that one.
So the rest of the required parts are on the way. Got a smokin' deal on a set of Manley 427 exhaust valves on epay. I did some wishful messing out in the garage today. Tried the full size exhaust valves with a std bore 390 block.
![Roll Eyes ::)](http://fepower.net/simplemachinesforum/Smileys/default/rolleyes.gif)
1.75 no go! Going to have to be around CJ size. Maybe see what 1.66 looks like. On the intake side will see how 2.15 fits.