There are a couple of TVR owners with the RV8 that have successfully used the Lockheed Power Stop type servo to ease their ageing joints and heavy clutch actions http://www.s-v-c.co.uk/product/lockheed ... ype-servo/
Tom,
The last of you calcs through me a bit given the large travel quoted.
I make the answer 51.74 mm movement.
The 19664 I think should be divide by the area of a 22mm cylinder not the diameter.
Regards Denis
1950 A40 Devon Hotrod with 5.0 twin turbo RV8.
EDIS8 wasted spark, Holley Injection.
Been as far as the Moon and back in 57 years of driving. Same Car, 5 engine upgrades !!!