[Fot] alternative rocker arms for TR6

[Enquiries Road & Track]

has anyone found an alternative, higher ratio rocker arm that can be
adapted into a 6 cyl??. I know about the various brands of roller rocker,
but some of our historic race classes here prevents their use. i have found
some old volvo ones which are close, but not close enough to avoid massive
re-engineering. any alternatives???

thanks
Terry (TR5)