Do these have the same mounting depth and position as oem 302 bronco pulleys? My older March billets weren't close and required a lot of creative spacing. I'm running a flow cooler water pump too if it matters.

Yes, 66-77 Bronco at least. The balancer needs to have a flat face, like our #'s 8057 and 8058. If your balancer is different, and has a raised portion, where the pulley mounts, then the crank pulley will not line up, and be about an inch further forward. Otherwise, we would not expect any issue.