OK, missed that LOL. I've reread your OP and didn't see where you checked the timing. Point gap effects timing.
If you've got a dwell meter make sure it falls in between 30-38.
I've also got a 49 216 and I've found that setting the timing to the BB at 500-550 rpm worked best. I've tried setting by max vacuum and advancing more due to better fuel but in my particular engine setting by original spec gives best all around performance.
If all that is good, take a $1 bill or similar and hold it over the exhaust pipe while idling. If it sucks in at any point you've got either a tight, sticking or burnt exhaust valve.
If it doesn't I wouldn't rule out checking the Roch B's throttle shaft for being a little loose causing a vacuum leak.
Good luck
