At 10:39 PM 11/30/97 -0800, you wrote:
>Does anyone know the significance of the "L" or "B" that is cast into
>the left rear corner outside the valve cover of the MGB head? It is
>opposite the "18" cast into the other corner. I have a 72 BGT with an
>"L" head that is warped and my only spare has the "B" designation cast
>into it. Are they interchangeable? The rocker shaft assemblies are
>compatible, hence the oil galley for the rear pedestal is in the same
>location. The "L" head does not have the engine id plate attached, it
>was removed by the PO so I cannot identify its proper vintage. Both
>heads were originally fitted with smog pumps but the "L" head has double
>valve springs while the "B" head does not. Guess what I really need to
>know is the exchangability of these heads.
>Frank Krajewski "RI Swamp Yankee"
>
>
>I know that L designates low compression. My guess is that you're
misreading the H and it is for high compression. They're interchangeable.
I've had MG's for 30 years.
Don Scott
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