Not Ranked
The only head that might be better than the AFR's is the Trickflow "R" (not standard twisted wedge) head when used on a big serious motor but they have unique exhaust ports that you would have to make headers for. For a 351 cu in motor I would go with the AFR 185's or 205's if your motor is a little bigger. If you can find any MM&F magazines from late last year, they had some great head tests with flow and dyno numbers.
BTW, I have AFR 205's and they have ports that are larger than a Victor jr's runners. They also have an extra set of exhaust tapped holes to be able to make headers that don't have to narrow down to fit by the stock bolt locations.
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