Highest flowing sbm heads?
Its certainly doable but not very common. Seen some local SB 400+ cubers run anywhere between 10.50's with ported J's to high 9's with W9's in street cars.
Vic Bloomer has been mid 9’s in his 67 Barracuda with a stock stroke 340 and 1.92 valved iron heads
plenty of guys in the Mopar community have seen it do that .
he broke it a while back, finally back together again.
another note, the Bloomer heads he did, which I and several others have bought on here, have already been 6.08 at 112 on a 2920 pound car on gas and are under 12 to 1.
Mine was never intended to be a record setter, but with a couple of modest changes in the works, it will run very respectably as well.
another guy has been 132 with the heads at 3175 on pump gas.
so, definately another option. 2.08 valve, 200cc head, and very nice work.