Posted By: cudaman1969
426 Hemi deck height change - 09/22/14 07:05 AM
My block is already decked 1/8 inch, how much more can i take off? Reason being i have some issues on the deck and shaving would clear it up, then i would just add a spacer to get back to stock height. Any thoughts anyone? Its a 1968 block
Posted By: rickseeman
Re: 426 Hemi deck height change - 09/22/14 03:27 PM
Wow, bad deal. I guess you could deck to clean up, then use the spacer and double head gaskets. I would probably use head studs if I could since you have less head threads. Unless you are married to this block I would look for another.
Posted By: JAKE68
Re: 426 Hemi deck height change - 09/22/14 05:58 PM
THAT IS NOT AN ISSUE WE SHAVE WAY MORE THAN THAT ON SUPER STOCK BLOCKS
Posted By: B G Racing
Re: 426 Hemi deck height change - 09/22/14 06:26 PM
We use to shave .200+ years ago when piston choise was limited.We have saved many of the blocks from those days by using spacers and steel shim head gaskets.If your not going to cut more than .120 you can always get a custom MLS gasket to bring the deck back to spec.
Posted By: cudaman1969
Re: 426 Hemi deck height change - 09/23/14 01:08 AM
Thanks for the answers. I'm thinking i need another 1/8 inch. Bob you said steel shim under the spacer, would copper work over and under better? I could cut the copper flush to the spacer, rings are lower so no interferance just don't want any gaps. Should i drill and tap the bolt holes deeper, i'm using studs?
Posted By: B G Racing
Re: 426 Hemi deck height change - 09/23/14 12:24 PM
Embossed copper shim gaskets will work,thick smooth copper might not seal well.If you have aprox.1" of thread you should be fine.
Posted By: cudaman1969
Re: 426 Hemi deck height change - 09/24/14 01:29 PM
The issue is not so much the deck but cylinder-deck. I've been trying to think of different ways of fixing the problem without making new problems. Some previous owner went wild with a grinder creating a chamfer for the intake valve that got real close to a push rod hole(all eight) was pondering welding but what can of worms will that open up so milling just enough to take the chamfer out some seems the easiest way. If i had a couple of 3500 hundred dollar bills laying around i could buy a better block then throw all what i got away and start over, so i'm trying to fix what i got, once.
Posted By: JohnRR
Re: 426 Hemi deck height change - 09/24/14 02:36 PM
Decks get welded all the time , you should be able to weld most of that chamfer up and then kiss the deck to clean it up.