LT4 rockers on stock springs
New rockers need new springs. Furthermore, the LT4 springs were designed to work with the LT4 valves, which are lighter than the LT1 valves. So really you should get some good aftermarket springs when increasing the rocker ratio.
I just posted a thread, I posted up some springs
from Crane 404psi rating, 1.175 coil bind point the part number: 96877-16
or from crane 391psi rating 1.085 coil bind the partnumber: 99893-16
from comp cams 403psi rating, 1.195 partnumber: 978-16
just in case you want to look for your self other brands, remember you need a outside diameter spring of 1.460 and an installed hieght 1.85
from Crane 404psi rating, 1.175 coil bind point the part number: 96877-16
or from crane 391psi rating 1.085 coil bind the partnumber: 99893-16
from comp cams 403psi rating, 1.195 partnumber: 978-16
just in case you want to look for your self other brands, remember you need a outside diameter spring of 1.460 and an installed hieght 1.85
