bdave, If I were in your shoes, I wouldn't go either A or B block. For near enough the same money, I would buy a new Burtz engine. With either A or B, by the time you crack test everything, rebore, grind the crank, pour bearings (or machine the block for inserts), you are up for $$$$. Comparing A and B engines to a Burtz is like apples and oranges. If you want performance with longevity, IMO, there is no alternative. 2 inch mains and big end journals, fully pressurised mains, rods and cam shaft bearings, inserted bearings all through it. The block, rods and crank are BRAND NEW, not nearing 100 years old and all the fatigued components that go with that and externally, it looks the same.
If you want it to GO, higher compression heads, better cams etc are readily available. 100 hp is not that hard to get and it will last.
If you can't tell, I love my Burtz.
