B1 original heads.
T&D 1.7 ratio rocker arms. Part number 8013, 5/8” shaft, paired rockers per cylinder.
Titanium 10 degree retainers.
I bought these heads from another racer that decided to go a different route. These heads are “new”. He had them CNC ported, new valves and heads “prepped”. As part of the deal, he supplied the used B1 cast intake manifold, RB spacers, used fabricated aluminum valve covers with spray bar oiling, used titanium retainers, used B1 head studs, and a new roller cam. The chambers are 60cc, intake port volume of the heads are 332cc and the exhaust ports are 125cc. The openings on the heads (CNC) are 2.740” x 1.755” , divider 0.250”. The flow sheet the previous owner gave me shows:
