I have a 400 stroker motor, 4.300 stroke, with a set of 440-1 heads with a set of paired shaft Jesel 1.55 ratio not aluminum, (maybe chrome moly steel?) rocker arms. Jesel tech said they don't make any rocker arm with any other material than aluminmum Mine are not aluminum
I'm using both pushrod and spray bar oiling in it.
It has a custom grind Ultradyne solid roller cam with right at .770 net lift and either 275 Lbs on the seats with 750 lbs. open or 390 lbs. on the seats with 910 lbs. opened I did set them up with between .060 to .080 from coil bind on all the springs My notes show both pressures so I will have to check that and write down the correct numbers on the build sheet
This is my first motor with a paired shaft rocker arm system, I haven't ran it yet but it will go in the bracket car this winter I'm hoping it is not a part breaker