425 toro heads

[oltoronut]

Quick question... Just picked up a set of B heads... Big valve for toronado

Did the 425 engine have two sets of heads or would these be for the 455 engine.

[69W34]

The 'B' heads were used in 65 - 66 425's and came in two valve configurations those with 2.00" intake valves and 2.072" intake valves, the latter were used on the Toro's.* Beginning in 67 the 425's used the 'C' heads then continued use on the 68-9 455's*

*there were other applications and some finer points can be found in Olds FAQ.... but don't apply here