I'm at about 23/33 . For a stroker it doesn't seem to like lower rpm's. But I'm thinking that's mostly the cam talking. I've still got so much tuning left on the table .
went thru this w/ my 406 vega. "torco mock 1 accelerator" worked fantastic. carried a qt. w/ me, added it at the 91 octane pump. it`s price has gone way up since then, but it is handy to have high octane at any pump. mix it accordingly.