MGB-ugh. This car was an MGA chassis with a monocoque shell welded to it so was too heavy to start with despite having a slightly larger but still anaemic engine,and remained under-developed all its life.As an example the Volvo 1800cc engine had identical bore and stroke yet in production form produced way may power than the B engine and is regularly raced with 190bhp-how much can the B series be persuaded to produce ,140bhp or so.