First thing holley jets out of the box are no where what the number says.. Try to get a set of pins and gauge the jets.. I run 84/86 on a stock stroke 440 with 906 heads that are cleaned up with a good valve job.. 11.97 comp. with a hyd flat tappet cam..
For instants the 86 jet is my 84.. Sounds like you are very lean.. Good luck..