Something around 18* BTDC initial, 800 rpm or under at idle, will be a reasonable starting point with that cam. Full mechanical advance should bring it around 32 - 36* between 2800 and 5000 rpm. Adjust that based on drag strip finish speed or dyno.It's a Purple Shaft P4452992, 238/238@50, 110 LSA. Mopar Perf. ''Purple Shaft'' Hydraulic Camshaft Kit I haven't really got enough knowledge to set timing, all i know is from Roadkill. And here, obviously.
Its still not going to be a great cam for use with vacuum booster, even with a reseviour.