I'm very enteristing in Model A and B engines. I've built a lot of them. An auto machinist all my life. 79 year young. I have a 31 Model A rumble seat coupe with a B engine, .060 bore, 33-34 cast counter weight crank, police head, down draft carb, 35# flywheel drilled for V8 9in, clutch and pp, B trans with 40-48 gears, 3:54 rear gears. Put a lot of miles on it in the last 10 years, will cruse 55-60 easy, 55mph 2300RPM. I'm building a spare B engine right now, with the late pressed on counter weights. If any question E-mail ( flatheadking@myfairpoint.net Walt Dupont