The B engine sounds good had a 1.8 done the head with std cam an carbs you get about 90 bhp with boreing to 1.9 -1950 good cam an 45s or big SUs should be about the 150 mark maybe more. ho and sorry cannot agree to the revs I had cooper 998 A type tuned B type and rover v8 all rev very well just need to build them right.