You’ll get there like we all do. Just takes time and money. The -1s are good heads for sure. I know B1 has good stuff too I just don’t have much experience with them.
I ran 8.40’s@160mph in my Daytona with 440-1 heads still fighting a fuel delivery issue. The Indy 440-1 heads are a simple head that I would recommend to anyone. Since those runs I reworked those heads and picked up some nice flow numbers and they were in the mid to upper 370cfm area. Since that time I had a local shop open them up for 2.250 valves, a move I wish I hadn’t done. I didn’t have my valve seat machine then and I’m hoping I can redo their rather simple valve job with the four angle cutter I have now. I’m guessing I can get those heads flowing in the 390cfm area. I have my B1 heads flowing 420cfm but they aren’t as user friendly. Hopefully I get to test them sometime but between the two heads I would recommend the ported Indy heads for most racers.