I saw on ebay there  is the tool for a 3/4 hex head.





54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

I have one of those tools, possibly a Mac brand.  When I was running stock head bolts I used that tool.  Since I have gone to 1/2" head bolts with 3/4" hex, the tool no longer works.  So now I just pull the rockers off, it's no big deal.

John - "The Hoosier Hurricane"

Some possibilities on ebay.

https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=blue+point+head+torque&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=head+torque+adapter&LH_ItemCondition=4&rt=nc 



Lawrenceville, GA

While both of the pictured tools will fit the head bolts with the rockers in place, the one at the top in the picture does give the best results.
 
If I can put my hands on the Manzel tool catalog I have around here somewhere, I’ll know what the official name is for those tools.  In lieu of not having a catalog handy, for the time being I’ll call those either a head bolt torque adapter or a cylinder head bolt wrench.

Lorena, Texas (South of Waco)

In your opinion Ted, would those work with the rockers in place? Do you know what the official name for them is?

Durham Missouri

These are made by ‘Blue Point’
 

Lorena, Texas (South of Waco)

It looked similar to this tool.

Durham Missouri

https://www.mscdirect.com/product/details/75230664        They are called "crow's feet" sockets.  You will need to be ambidextrous when you use them.  I would use the ones with 12 point instead of the open foot ones.    Joe-JDC

JDC

Like this?

https://www.ebay.com/itm/Snap-On-tools-Torque-wrench-adapter-S-8666/254738026987?hash=item3b4f91d1eb:g:-0QAAOSw9KZe2oci

Thanks Dobie but it's not on that site. It's a U shape so the head bolts can be torqued with the rockers in place.

Durham Missouri