My experience, for what it's worth. 86 Sunsport, 351, 1:1 Velvet Drive. Original prop was a Michigan Wheel 13x13 3-blade. I tried the 4-blade which gave me better hole-shot but no top-end. Finally settled on ACME 543 which is 13x11.5 3-blade. It has the hole-shot of a 4-blade with the top speed of the 3-blade. Happy camper!
https://skidim.com/543-13-x-11-5-080...caAmguEALw_wcB
Sent from my SM-G973U using Tapatalk