My 340

260 does seem low for the B1/BA heads with their 2.08 intake valves. I imagine there are some dramatic flow numbers in those heads with a minimum amount of work if you can find someone who’s experienced with them. The cam LSA for this combination is dead on based on the 128 formula and 11.8 compression. There’s probably some better cam choices out there. But without actually knowing how good or bad the head flow numbers are, I wouldn’t deviate from it. There’s no doubt that there is low 11 second potential for that build, but it may take more cam / gear / converter than what you are presently planning on. It will definitely be interesting to see what numbers it turns once you get the tune and traction optimized, I’ve known of less to go faster than my guesstimate.