Can someone tell me the size of the o rings on the rocker arm shafts? These fit in the rocker box when the shafts are pressed in. My gasket /seal kit does not include them. I have some 1/6" cross section, 3/8" ID, 1/2" OD o rings but they look too thick, like the shafts will never press into the rocker box..

Hi Mcman

I was unable to source them during my rebuild and being so small near impossible to measure. They are a tight fit and you possibly would get away with the old ones and a dab of silicone.