Distributor opinions

I will soon be running a 408 with MSD 6AL and the MP distributor that comes with the MP conversion kit. I will be running mainly on the street and want to keep the vacuum advance if possible. The engine will put out 425 HP at 5000 and 515 ft lbs at 3000 (both flywheel per Desktop Dyno) with a 3.23 SG 8 ¾ rear.

I’m looking for any suggestions/opinions as to what distributor to change to or just keep the MP. I will need to buy another distributor regardless of what I use on the 408, because the current 360 in the Barracuda is going into my Ramcharger. So I either run the MP distributor on both engines or use a new distributor on the 408 and the current MP on the RC.

Thanks,
Eric
69 B5 360 FB